Battery firmware lockout - Revision history

92.116.201.159: Fixing typos and minor grammar mistakes. Clarifying some abbreviations.

2026-03-13T12:23:11Z

Fixing typos and minor grammar mistakes. Clarifying some abbreviations.

Charlie 6: /* Consumer reactions */ added mention of compatible third-party battery packs

2026-02-26T15:16:34Z

Consumer reactions: added mention of compatible third-party battery packs

← Older revision		Revision as of 15:16, 26 February 2026
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	There are ways of tackling battery firmware lockout:		There are ways of tackling battery firmware lockout:

	*Replacing the battery pack: This is the simplest way of "repairing" a "bricked" battery. However doing so is costly, increases e-waste production and further fuels planned obsolescence of said manufacturers.		*Replacing the battery pack: This is the simplest way of "repairing" a "bricked" battery. However doing so is costly, increases e-waste production and further fuels planned obsolescence of said manufacturers. Some compatible third-party battery packs don't have lockout mechanism, making it possible for the user to replace cells in the pack and cycle charge to calibrate its meter. However, the exact makes and models aren't well-known.
	*Extracting the BMS code: Certain logic analyzers can extract the code from communications to and from the BMS chip. Users or repair technicians can use this way to extract the "unseal" password, then reset the "permanent fail" flag and recalibrate the battery's capacity.		*Extracting the BMS code: Certain logic analyzers can extract the code from communications to and from the BMS chip. Users or repair technicians can use this way to extract the "unseal" password, then reset the "permanent fail" flag and recalibrate the battery's capacity.
	*Acquiring the unlock password: Some of the battery models' BMS code has been leaked, some of them are publicized<ref>{{Cite web \|last=@davext \|date=25 Jun 2024 \|title=unbrick-dji \|url=https://github.com/davext/unbrick-dji/blob/main/src/main.cpp \|url-status=live \|archive-url=https://web.archive.org/web/20250914163205/https://github.com/davext/unbrick-dji/blob/main/src/main.cpp \|archive-date=14 Sep 2025 \|access-date=14 Sep 2025 \|website=[Github]}}</ref>. For others, it might be possible to purchase it in the grey market, however, there's a risk of scam as some of the passwords can be as expensive as the pack itself, and there's no guarantee of working.		*Acquiring the unlock password: Some of the battery models' BMS code has been leaked, some of them are publicized<ref>{{Cite web \|last=@davext \|date=25 Jun 2024 \|title=unbrick-dji \|url=https://github.com/davext/unbrick-dji/blob/main/src/main.cpp \|url-status=live \|archive-url=https://web.archive.org/web/20250914163205/https://github.com/davext/unbrick-dji/blob/main/src/main.cpp \|archive-date=14 Sep 2025 \|access-date=14 Sep 2025 \|website=[Github]}}</ref>. For others, it might be possible to purchase it in the grey market, however, there's a risk of scam as some of the passwords can be as expensive as the pack itself, and there's no guarantee of working.
	*Resetting the BMS: Some specialized hardware and software can be used to clear the PF flag, reviving the battery without the need of knowing the battery's parameters. Most of the users ~~won~~'t modify the battery ~~pack~~ after repairing<ref>{{Cite web \|date=2019-08-15 \|title=Reset-BQ20xx \|url=https://github.com/otofoto/Reset-BQ20xx \|url-status=live \|archive-url=https://web.archive.org/web/20220923061011/https://github.com/otofoto/Reset-BQ20xx \|archive-date=2022-09-23 \|access-date=2025-09-13 \|website=[[Github]]}}</ref>.		*Resetting the BMS: Some specialized hardware and software can be used to clear the PF flag, reviving the battery without the need of knowing the battery's parameters. Most of the users don't have a need for modify the battery's parameters after repairing<ref>{{Cite web \|date=2019-08-15 \|title=Reset-BQ20xx \|url=https://github.com/otofoto/Reset-BQ20xx \|url-status=live \|archive-url=https://web.archive.org/web/20220923061011/https://github.com/otofoto/Reset-BQ20xx \|archive-date=2022-09-23 \|access-date=2025-09-13 \|website=[[Github]]}}</ref>.
	*Install a custom (or OEM) BMS chip: Buying a brand new BMS chip and write own program. The main challenge is the knowledge of the working mechanism of the battery and its BMS. Different battery chemistries have different voltage and current characteristics, using the wrong data may cause incorrect capacity reading at best, or battery/device malfunction at worst.		*Install a custom (or OEM) BMS chip: Buying a brand new BMS chip and write own program. The main challenge is the knowledge of the working mechanism of the battery and its BMS. Different battery chemistries have different voltage and current characteristics, using the wrong data may cause incorrect capacity reading at best, or battery/device malfunction at worst.

Bananabot: Added archive URLs for 4 citation(s) using CRWCitationBot

2026-02-23T03:39:39Z

Added archive URLs for 4 citation(s) using CRWCitationBot

← Older revision		Revision as of 03:39, 23 February 2026
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	When the battery is outside its operating range, such as overcharged, overcharged, overheated, unbalanced(in multi-celled battery packs), the BMS prevents the battery from further usage, limiting damage. However, the BMS should resume normal operation when the battery is back within operating range. Instead, the BMS changes bytes in its memory, leading to a "Permanent Fail (PF)" state, preventing the use of said battery even after reconditioning or repairing.		When the battery is outside its operating range, such as overcharged, overcharged, overheated, unbalanced(in multi-celled battery packs), the BMS prevents the battery from further usage, limiting damage. However, the BMS should resume normal operation when the battery is back within operating range. Instead, the BMS changes bytes in its memory, leading to a "Permanent Fail (PF)" state, preventing the use of said battery even after reconditioning or repairing.

	Documentations from known BMS manufacturers such as Texas Instruments said the device can permanently disable the use of the battery pack in case of a "severe failure"<ref>[https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf? https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf?]</ref>. However users report the battery is "bricked" after scenarios like long-term storage, discharging laptop overnight or use a power tool in warm environment while charging it cool, indicating the manufacturers have abused the BMS program, exaggerating the nature of the failure as a from of [[self-destructive design]].		Documentations from known BMS manufacturers such as Texas Instruments said the device can permanently disable the use of the battery pack in case of a "severe failure"<ref>[https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf? https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf?] ([http://web.archive.org/web/20250604023257/https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf Archived])</ref>. However users report the battery is "bricked" after scenarios like long-term storage, discharging laptop overnight or use a power tool in warm environment while charging it cool, indicating the manufacturers have abused the BMS program, exaggerating the nature of the failure as a from of [[self-destructive design]].

	To make matters worse, many of the BMS needs "access code" to read and change it's parameters, including runtime ones like the "Permanent Fail" flag. The unlock or unseal code is kept secret by the battery's manufacturer, making user and third-parties very difficult, if not impossible, to repair said battery<ref>{{Cite web \|date=28 Sep 2019 \|title=Experiences with TI BQ management IC’s when re-building laptop batteries? \|url=https://www.eevblog.com/forum/chat/experiences-with-ti-bq-management-ics-when-revelling-laptop-batteries/?all \|url-status=live \|archive-url=https://web.archive.org/web/20240926193741/https://www.eevblog.com/forum/chat/experiences-with-ti-bq-management-ics-when-revelling-laptop-batteries/?all \|archive-date=26 Sep 2024 \|access-date=13 Sep 2025 \|website=EEVblog Electronics Community Forum}}</ref>.		To make matters worse, many of the BMS needs "access code" to read and change it's parameters, including runtime ones like the "Permanent Fail" flag. The unlock or unseal code is kept secret by the battery's manufacturer, making user and third-parties very difficult, if not impossible, to repair said battery<ref>{{Cite web \|date=28 Sep 2019 \|title=Experiences with TI BQ management IC’s when re-building laptop batteries? \|url=https://www.eevblog.com/forum/chat/experiences-with-ti-bq-management-ics-when-revelling-laptop-batteries/?all \|url-status=live \|archive-url=https://web.archive.org/web/20240926193741/https://www.eevblog.com/forum/chat/experiences-with-ti-bq-management-ics-when-revelling-laptop-batteries/?all \|archive-date=26 Sep 2024 \|access-date=13 Sep 2025 \|website=EEVblog Electronics Community Forum}}</ref>.

	Alarmingly, the condition of "bricking" includes "Capacity Degradation Permanent Failure"<ref>[https://www.ti.com/lit/ds/symlink/bq40z50.pdf? https://www.ti.com/lit/ds/symlink/bq40z50.pdf?]</ref>, which means the manufacturers can artificially limit the battery pack's lifespan, making it unusable after a certain health (e.g 80%).		Alarmingly, the condition of "bricking" includes "Capacity Degradation Permanent Failure"<ref>[https://www.ti.com/lit/ds/symlink/bq40z50.pdf? https://www.ti.com/lit/ds/symlink/bq40z50.pdf?] ([http://web.archive.org/web/20250826014752/https://www.ti.com/lit/ds/symlink/bq40z50.pdf Archived])</ref>, which means the manufacturers can artificially limit the battery pack's lifespan, making it unusable after a certain health (e.g 80%).

	==Why it is a problem==		==Why it is a problem==
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	===Environmental impact===		===Environmental impact===
	Lithium-ion batteries are 95% recyclable, however, only about 5% of them are actually recycled<ref>{{Cite web \|date=22 Sep 2022 \|title=Lithium ion battery recycling \|url=https://www.cas.org/resources/cas-insights/lithium-ion-battery-recycling?utm_source=chatgpt.com \|url-status=live}}</ref>. BMS firmware lockout increases the number of battery packs end up in waste, increasing pollution. Some of the materials like cobalt, are hazardous.		Lithium-ion batteries are 95% recyclable, however, only about 5% of them are actually recycled<ref>{{Cite web \|date=22 Sep 2022 \|title=Lithium ion battery recycling \|url=https://www.cas.org/resources/cas-insights/lithium-ion-battery-recycling?utm_source=chatgpt.com \|url-status=live \|archive-url=http://web.archive.org/web/20260216013331/https://www.cas.org/resources/cas-insights/lithium-ion-battery-recycling?utm_source=chatgpt.com \|archive-date=16 Feb 2026}}</ref>. BMS firmware lockout increases the number of battery packs end up in waste, increasing pollution. Some of the materials like cobalt, are hazardous.

	===Undermining ownership===		===Undermining ownership===
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	===Commercial UAVs===		===Commercial UAVs===
	{{Main\|DJI}}		{{Main\|DJI}}
	DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club \|archive-url=http://web.archive.org/web/20260210084910/https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|archive-date=10 Feb 2026}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots \|archive-url=http://web.archive.org/web/20250517190808/https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|archive-date=17 May 2025}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.		DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club \|archive-url=http://web.archive.org/web/20260210084910/https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|archive-date=10 Feb 2026}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda \|archive-url=http://web.archive.org/web/20260216013455/https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|archive-date=16 Feb 2026}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots \|archive-url=http://web.archive.org/web/20250517190808/https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|archive-date=17 May 2025}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.

	===Home appliances===		===Home appliances===

Banana: Removed 2 duplicate url-status parameter(s) from 2 citation(s) using CRWCitationBot

2026-02-16T06:20:44Z

Removed 2 duplicate url-status parameter(s) from 2 citation(s) using CRWCitationBot

← Older revision		Revision as of 06:20, 16 February 2026
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	===Commercial UAVs===		===Commercial UAVs===
	{{Main\|DJI}}		{{Main\|DJI}}
	DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club ~~\|url-status=live~~ \|archive-url=http://web.archive.org/web/20260210084910/https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|archive-date=10 Feb 2026}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots ~~\|url-status=live~~ \|archive-url=http://web.archive.org/web/20250517190808/https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|archive-date=17 May 2025}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.		DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club \|archive-url=http://web.archive.org/web/20260210084910/https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|archive-date=10 Feb 2026}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots \|archive-url=http://web.archive.org/web/20250517190808/https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|archive-date=17 May 2025}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.

	===Home appliances===		===Home appliances===

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2026-02-16T01:31:33Z

Added archive URLs for 3 citation(s) using CRWCitationBot

← Older revision		Revision as of 01:31, 16 February 2026
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	===Commercial UAVs===		===Commercial UAVs===
	{{Main\|DJI}}		{{Main\|DJI}}
	DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.		DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club \|url-status=live \|archive-url=http://web.archive.org/web/20260210084910/https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|archive-date=10 Feb 2026}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots \|url-status=live \|archive-url=http://web.archive.org/web/20250517190808/https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|archive-date=17 May 2025}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.

	===Home appliances===		===Home appliances===
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	===Power tools===		===Power tools===
	{{Main\|Milwaukee battery drm}}		{{Main\|Milwaukee battery drm}}
	Power tool manufacturers such as Ryobi and Makita are known to lock battery backs, causing good ones to fail and ended up in repair centers, or worse, landfills. Badar, a known electrical engineer, managed to recover 30 "bricked" battery pack back to normal, reducing e-waste<ref>https://www.youtube.com/watch?v=NQ_lyDyzEHY</ref>. Although 19% of them deeply discharged were no longer safe to charge. 65% of bricked batteries were purely due to software lockout with no performance impact after unbricking and recharging. Additionally, 13% had unbalanced cell, which were easily resolved by using an external power supply to bring the cells to the same level one by one, however, "unbricking" procedure is still required for normal use<ref>{{Cite web \|last=Kayani \|first=Badar Jahangir \|date=2025-08-24 \|title=Ryobi Battery Repair Guide \|url=https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|url-status=live \|archive-url=https://web.archive.org/web/20250915074416/https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|archive-date=2025-09-15 \|access-date=2025-09-15 \|website=Badar Jahangir Kayani}}</ref>.		Power tool manufacturers such as Ryobi and Makita are known to lock battery backs, causing good ones to fail and ended up in repair centers, or worse, landfills. Badar, a known electrical engineer, managed to recover 30 "bricked" battery pack back to normal, reducing e-waste<ref>https://www.youtube.com/watch?v=NQ_lyDyzEHY ([https://preservetube.com/watch?v=NQ_lyDyzEHY Archived])</ref>. Although 19% of them deeply discharged were no longer safe to charge. 65% of bricked batteries were purely due to software lockout with no performance impact after unbricking and recharging. Additionally, 13% had unbalanced cell, which were easily resolved by using an external power supply to bring the cells to the same level one by one, however, "unbricking" procedure is still required for normal use<ref>{{Cite web \|last=Kayani \|first=Badar Jahangir \|date=2025-08-24 \|title=Ryobi Battery Repair Guide \|url=https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|url-status=live \|archive-url=https://web.archive.org/web/20250915074416/https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|archive-date=2025-09-15 \|access-date=2025-09-15 \|website=Badar Jahangir Kayani}}</ref>.

	===Electric vehicles===		===Electric vehicles===

Charlie 6: /* Power tools */ slight edit of unbricking Ryobi batteries by Badar

2025-09-15T07:55:07Z

Power tools: slight edit of unbricking Ryobi batteries by Badar

← Older revision		Revision as of 07:55, 15 September 2025
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	===Power tools===		===Power tools===
	{{Main\|Milwaukee battery drm}}		{{Main\|Milwaukee battery drm}}
	Power tool manufacturers such as Ryobi and Makita are known to lock battery backs, causing good ones to fail and ended up in repair centers, or worse, landfills. Badar, a known ~~repair technician~~, managed to recover 30 "bricked" battery pack back to normal, reducing e-waste<ref>https://www.youtube.com/watch?v=NQ_lyDyzEHY</ref>. Although 19% of them deeply discharged were no longer safe to charge. 65% of bricked batteries were purely due to software lockout with no performance impact after unbricking and recharging. Additionally, 13% had unbalanced cell, which were easily resolved by using an external power supply to bring the cells to the same level one by one, however, "unbricking" procedure is still required for normal use<ref>{{Cite web \|last=Kayani \|first=Badar Jahangir \|date=2025-08-24 \|title=Ryobi Battery Repair Guide \|url=https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|url-status=live \|archive-url=https://web.archive.org/web/20250915074416/https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|archive-date=2025-09-15 \|access-date=2025-09-15 \|website=Badar Jahangir Kayani}}</ref>.		Power tool manufacturers such as Ryobi and Makita are known to lock battery backs, causing good ones to fail and ended up in repair centers, or worse, landfills. Badar, a known electrical engineer, managed to recover 30 "bricked" battery pack back to normal, reducing e-waste<ref>https://www.youtube.com/watch?v=NQ_lyDyzEHY</ref>. Although 19% of them deeply discharged were no longer safe to charge. 65% of bricked batteries were purely due to software lockout with no performance impact after unbricking and recharging. Additionally, 13% had unbalanced cell, which were easily resolved by using an external power supply to bring the cells to the same level one by one, however, "unbricking" procedure is still required for normal use<ref>{{Cite web \|last=Kayani \|first=Badar Jahangir \|date=2025-08-24 \|title=Ryobi Battery Repair Guide \|url=https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|url-status=live \|archive-url=https://web.archive.org/web/20250915074416/https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|archive-date=2025-09-15 \|access-date=2025-09-15 \|website=Badar Jahangir Kayani}}</ref>.

	===Electric vehicles===		===Electric vehicles===

Charlie 6: /* Power Tools */ added a main page and more details about Badar's unbricking Ryobi batteries

2025-09-15T07:53:45Z

Power Tools: added a main page and more details about Badar's unbricking Ryobi batteries

← Older revision		Revision as of 07:53, 15 September 2025
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	===Power tools===		===Power tools===
	Power tool manufacturers such as Ryobi and Makita are known to lock battery backs, causing good ones to fail and ended up in repair centers, or worse, landfills<ref>https://www.youtube.com/watch?v=NQ_lyDyzEHY</ref>. ~~Repair technicians who know how~~ to ~~"unbrick" the BMS are capable~~ of ~~reviving these units~~ with ~~perfect condition~~, ~~reducing e~~-~~waste~~.		{{Main\|Milwaukee battery drm}}
			Power tool manufacturers such as Ryobi and Makita are known to lock battery backs, causing good ones to fail and ended up in repair centers, or worse, landfills. Badar, a known repair technician, managed to recover 30 "bricked" battery pack back to normal, reducing e-waste<ref>https://www.youtube.com/watch?v=NQ_lyDyzEHY</ref>. Although 19% of them deeply discharged were no longer safe to charge. 65% of bricked batteries were purely due to software lockout with no performance impact after unbricking and recharging. Additionally, 13% had unbalanced cell, which were easily resolved by using an external power supply to bring the cells to the same level one by one, however, "unbricking" procedure is still required for normal use<ref>{{Cite web \|last=Kayani \|first=Badar Jahangir \|date=2025-08-24 \|title=Ryobi Battery Repair Guide \|url=https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|url-status=live \|archive-url=https://web.archive.org/web/20250915074416/https://badar.tech/2025/08/24/ryobi-battery-repair-guide/ \|archive-date=2025-09-15 \|access-date=2025-09-15 \|website=Badar Jahangir Kayani}}</ref>.

	===Electric vehicles===		===Electric vehicles===

Charlie 6: /* Consumer reactions */ added a source, slight paraphrase

2025-09-14T16:36:29Z

Consumer reactions: added a source, slight paraphrase

← Older revision		Revision as of 16:36, 14 September 2025
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	==How it works==		==How it works==
	When the battery is outside its operating range, such as overcharged, overcharged, overheated, unbalanced(in multi-celled battery packs), the BMS prevents the battery from further usage, limiting damage. However, the BMS should resume normal operation when the battery is back within operating range. Instead, the BMS changes bytes in its memory, leading to a "Permanent Fail (PF)" state, preventing the use of said battery even after ~~recondition~~ or ~~repair~~.		When the battery is outside its operating range, such as overcharged, overcharged, overheated, unbalanced(in multi-celled battery packs), the BMS prevents the battery from further usage, limiting damage. However, the BMS should resume normal operation when the battery is back within operating range. Instead, the BMS changes bytes in its memory, leading to a "Permanent Fail (PF)" state, preventing the use of said battery even after reconditioning or repairing.

	Documentations from known BMS manufacturers such as Texas Instruments said the device can permanently disable the use of the battery pack in case of a "severe failure"<ref>[https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf? https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf?]</ref>. However users report the battery is "bricked" after scenarios like long-term storage, discharging laptop overnight or use a power tool in warm environment while charging it cool, indicating the manufacturers have abused the BMS program, exaggerating the nature of the failure as a from of [[self-destructive design]].		Documentations from known BMS manufacturers such as Texas Instruments said the device can permanently disable the use of the battery pack in case of a "severe failure"<ref>[https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf? https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf?]</ref>. However users report the battery is "bricked" after scenarios like long-term storage, discharging laptop overnight or use a power tool in warm environment while charging it cool, indicating the manufacturers have abused the BMS program, exaggerating the nature of the failure as a from of [[self-destructive design]].
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	*Replacing the battery pack: This is the simplest way of "repairing" a "bricked" battery. However doing so is costly, increases e-waste production and further fuels planned obsolescence of said manufacturers.		*Replacing the battery pack: This is the simplest way of "repairing" a "bricked" battery. However doing so is costly, increases e-waste production and further fuels planned obsolescence of said manufacturers.
	*Extracting the BMS code: Certain logic analyzers can extract the code from communications to and from the BMS chip. Users or repair technicians can use this way to extract the "unseal" password, then reset the "permanent fail" flag and recalibrate the battery's capacity.		*Extracting the BMS code: Certain logic analyzers can extract the code from communications to and from the BMS chip. Users or repair technicians can use this way to extract the "unseal" password, then reset the "permanent fail" flag and recalibrate the battery's capacity.
	*~~Buying~~ the unlock password: Some of the battery models' BMS code has been leaked ~~and~~ it's possible to purchase it in the grey market~~. However the legality of such behavior is in the gray area~~, there's a risk of scam, some of the passwords can be as expensive as the pack itself, and there's no guarantee of working.		*Acquiring the unlock password: Some of the battery models' BMS code has been leaked, some of them are publicized<ref>{{Cite web \|last=@davext \|date=25 Jun 2024 \|title=unbrick-dji \|url=https://github.com/davext/unbrick-dji/blob/main/src/main.cpp \|url-status=live \|archive-url=https://web.archive.org/web/20250914163205/https://github.com/davext/unbrick-dji/blob/main/src/main.cpp \|archive-date=14 Sep 2025 \|access-date=14 Sep 2025 \|website=[Github]}}</ref>. For others, it might be possible to purchase it in the grey market, however, there's a risk of scam as some of the passwords can be as expensive as the pack itself, and there's no guarantee of working.
	*Resetting the BMS: Some specialized hardware and software can be used to clear the PF flag, reviving the battery without the need of knowing the battery's parameters. Most of the users won't modify the battery pack after repairing<ref>{{Cite web \|date=2019-08-15 \|title=Reset-BQ20xx \|url=https://github.com/otofoto/Reset-BQ20xx \|url-status=live \|archive-url=https://web.archive.org/web/20220923061011/https://github.com/otofoto/Reset-BQ20xx \|archive-date=2022-09-23 \|access-date=2025-09-13 \|website=[[Github]]}}</ref>.		*Resetting the BMS: Some specialized hardware and software can be used to clear the PF flag, reviving the battery without the need of knowing the battery's parameters. Most of the users won't modify the battery pack after repairing<ref>{{Cite web \|date=2019-08-15 \|title=Reset-BQ20xx \|url=https://github.com/otofoto/Reset-BQ20xx \|url-status=live \|archive-url=https://web.archive.org/web/20220923061011/https://github.com/otofoto/Reset-BQ20xx \|archive-date=2022-09-23 \|access-date=2025-09-13 \|website=[[Github]]}}</ref>.
	*Install a custom (or OEM) BMS chip: Buying a brand new BMS chip and write own program. The main challenge is the knowledge of the working mechanism of the battery and its BMS. Different battery chemistries have different voltage and current characteristics, using the wrong data may cause incorrect capacity reading at best, or battery/device malfunction at worst.		*Install a custom (or OEM) BMS chip: Buying a brand new BMS chip and write own program. The main challenge is the knowledge of the working mechanism of the battery and its BMS. Different battery chemistries have different voltage and current characteristics, using the wrong data may cause incorrect capacity reading at best, or battery/device malfunction at worst.

Charlie 6: edit main article links

2025-09-13T15:06:24Z

edit main article links

← Older revision		Revision as of 15:06, 13 September 2025
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	===Commercial UAVs===		===Commercial UAVs===
	{{Main\|DJI}}DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.		{{Main\|DJI}}
			DJI, a well known commercial UAV manufacturer, locks out the battery after long-term storage, claiming over-discharging damages the battery, even if the chemistry is still recoverable. Users who successfully "revives" the battery packs by charging their cells using a bench power supply and clearing the failure code, reports restored functionality<ref>{{Cite web \|date=2024-03-21 \|title=Reviving dead batteries - a heads up \|url=https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|url-status=live \|archive-url=https://web.archive.org/web/20250618000130/https://mavicpilots.com/threads/reviving-dead-batteries-a-heads-up.146169/ \|archive-date=2025-06-18 \|access-date=2025-09-13 \|website=MavicPilots}}</ref><ref>{{Cite web \|date=2023-08-02 \|title=DJI Battery Killer repairing tool \|url=https://greyarro.ws/t/dji-battery-killer-repairing-tool/68863 \|url-status=live \|access-date=2025-09-13 \|website=Grey Arrows Drone Club}}</ref><ref>{{Cite web \|last=McLoughlin \|first=Liam \|date=2023-10-01 \|title=Repairing the DJI Spark Drone Battery with DJI Battery Killer, CP2112, & 9V battery \|url=https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|url-status=live \|archive-url=https://web.archive.org/web/20241211065622/https://leelum.com/projects/repairing-the-dji-spark-drone-battery-with-dji-battery-killer-cp2112-9v-battery/ \|archive-date=2024-12-11 \|access-date=2025-09-13 \|website=Leelum}}</ref><ref>{{Cite web \|title=DJI Battery Killer: Reviving Bricked DJI Drone Batteries with CP2112 & BMS Reset \|url=https://www.elektroda.com/qa,dji-battery-killer-cp2112-bms-reset.html \|url-status=live \|website=elektroda}}</ref>. However some users reported "authentication failed"<ref>{{Cite web \|date=2024-03-23 \|title=Mavic pro battery authentication failed after clear pf \|url=https://mavicpilots.com/threads/mavic-pro-battery-authentication-failed-after-clear-pf.144987/ \|url-status=live \|access-date=2025-09-13 \|website=MavicPilots}}</ref> suggesting the possibility of parts serialization<ref>{{Cite web \|last=Greenlee \|first=Lauren \|date=2023-01-17 \|title=How Parts Pairing Kills Independent Repair \|url=https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|url-status=live \|archive-url=https://web.archive.org/web/20250811033531/https://www.ifixit.com/News/69320/how-parts-pairing-kills-independent-repair \|archive-date=2025-08-11 \|access-date=2025-09-13 \|website=iFixit}}</ref>.

	===Home appliances===		===Home appliances===
	{{Main\|Dyson battery lifespan reduced by design and difficult to repair}}Dyson appliances often come with battery packs omitting balancing resistors, leading to higher battery degradation. When the battery cells are unbalanced, repaired or replaced. The BMS chip will lockout. This can be mitigated with added resistors and a custom firmware that doesn't brick the battery upon maintenance<ref name=":2">{{Cite web \|last=@tinfever \|title=(Unofficial) Firmware Upgrade for Dyson V6/V7 Vacuum Battery Management System \|url=https://github.com/tinfever/FW-Dyson-BMS \|url-status=live \|archive-url=https://web.archive.org/web/20250912021607/https://github.com/tinfever/FW-Dyson-BMS \|archive-date=2025-09-12 \|access-date=25 Mar 2025 \|website=GitHub}}</ref>.		{{Main\|Dyson battery lifespan reduced by design and difficult to repair}}
			Dyson appliances often come with battery packs omitting balancing resistors, leading to higher battery degradation. When the battery cells are unbalanced, repaired or replaced. The BMS chip will lockout. This can be mitigated with added resistors and a custom firmware that doesn't brick the battery upon maintenance<ref name=":2">{{Cite web \|last=@tinfever \|title=(Unofficial) Firmware Upgrade for Dyson V6/V7 Vacuum Battery Management System \|url=https://github.com/tinfever/FW-Dyson-BMS \|url-status=live \|archive-url=https://web.archive.org/web/20250912021607/https://github.com/tinfever/FW-Dyson-BMS \|archive-date=2025-09-12 \|access-date=25 Mar 2025 \|website=GitHub}}</ref>.

	===Power tools===		===Power tools===

Charlie 6: Added contents in /* Power tools /,/ Power tools / and / Lawsuits */

2025-09-13T15:04:14Z

Added contents in Power tools: ,Power tools: and Lawsuits

← Older revision		Revision as of 15:04, 13 September 2025
Line 34:		Line 34:

	===Power tools===		===Power tools===
	Ryobi		Power tool manufacturers such as Ryobi and Makita are known to lock battery backs, causing good ones to fail and ended up in repair centers, or worse, landfills<ref>https://www.youtube.com/watch?v=NQ_lyDyzEHY</ref>. Repair technicians who know how to "unbrick" the BMS are capable of reviving these units with perfect condition, reducing e-waste.

	===Electric vehicles===		===Electric vehicles===
	Tesla		Tesla cuts the range of some Model S and Model X by up to 20% by an OTA update. Some of the batteries became totally unusable, showing a "BMS_u029" error. Some users are able to reverse the change by flashing an older firmware, other users are forced to replace the entire battery pack, costing over $15,000<ref name=":0">{{Cite web \|last=Crandall \|first=Christine \|date=2023-05-18 \|title=How Tesla’s New OTA Software Update Cut EV Range By A Massive 20%, Owners Move To Sue \|url=https://www.hotcars.com/tesla-software-update-cut-ev-range-owners-move-to-sue/ \|archive-url=https://web.archive.org/web/20250413101832/https://www.hotcars.com/tesla-software-update-cut-ev-range-owners-move-to-sue/ \|archive-date=2025-04-13 \|access-date=2025-09-13 \|website=Hotcars}}</ref>.

	==Consumer reactions==		==Consumer reactions==
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	==Lawsuits==		==Lawsuits==
	Tesla		Four plaintiffs are suing Tesla over an automatic over-the-air (OTA) software update that they say reduced the driving range of their vehicles by 20 percent. Forced updates by Tesla may violate California's Computer Fraud and Abuse Act and the Unfair Competition Law<ref name=":0" />.

	==References==		==References==