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If your laptop battery is inaccuratelyolder or reporting its capacity or is older,incorrectly, it may be possible to recalibrate the battery. This can correct the reported capacity or battery gauge to extend its life.the life of the battery.
[ … ]
For help understanding what calibration is, why it’s important, and how to calibrate'''''IMPORTANT: Recalibration does not save worn out batteries in other types of devices, check- it ONLY corrects the capacity. There is no way to recover a worn out battery, but the [[Battery Calibration|Battery Calibration Wiki.]]situation can be temporarily improved.'''''
[ … ]
'''''Important: Battery recalibration will not save a worn out battery.''''' This will correct the reported capacityFor help understanding what calibration is, why it’s important, and extend it’s life for a short periodhow to calibrate batteries in other types of time, but will not recoverdevices, check out the pack. '''''If there are any improvements, these capacity bumps are typically short-term.'''''[[Battery Calibration|Battery Calibration Wiki.]]
[ … ]
=== ++Guide notes++ ===
* '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!'''''
* '''''If your pack is older, consider a discharge to ~10%. These may be damaged with a full discharge.'''''
* '''''In most cases, you'''''You will likely see a capacity decrease. This is good since the capacity reported by the BMS is accurate.'''''- not bad.'''''
* '''''Avoid'''''Try to avoid using your laptop while it is charging. This may affect calibration accuracy.'''''
* If your laptop does not allow you to use it when'''''Inconsistent reporting may indicate the battery drops tois EOL. This can be delayed with proper care, but not reversed.'''''
* '''''If your battery is older, consider a certain percentage, you will need to use a workaround. This varies based on the BIOS type (UEFI or Legacy).~10% discharge. A full discharge may cause damage.'''''
=== ++How to recalibrate the battery++ ===
* Charge the laptop to 100%.
* Use the laptopit until it reports a 0% capacity and shuts down and no longer turns on.
** See '''BIOS'''''BIOS lockouts (known)'''and known OEM quirks''''' for bypasses if you use an HP orand Lenovo laptop.laptops.
* Immediately recharge the battery to start recalibration.battery. Do not use the laptop.laptop if possible.
=== ++BIOS lockouts (known)++and known OEM quirks++ ===
* '''''HP'''''(BIOS lockout) HP laptops have a 15% BIOS lockout and will need to be bypassed to dofor a full discharge.discharge.''''' Immediately charge the battery once the battery reaches 0% and the laptop shuts off.'''''off.
** '''''All HP and most Compaq laptops.'''''
* '''''(BIOS lockout)''''' Some Lenovo laptops have a ~7%7% critical low capacity errorlockout (0190). '''''This only comes up
** '''''Only occurs if the laptop is turnedshuts off beforeearly. Easily bypassed.'''''
* '''''(EOL quirk) Some Dell batteries hold incorrect data once the battery reachedis nearing the end of it’s life. This self corrects with time, or another recalibration. I have seen this on OEM Dell batteries twice - notably, the NX31D (x2 with same issue) 65Wh (2014 DOM/E6440) and a RMJFW 65Wh Extended (2014 DOM/E6220)'''''
* '''''(Battery firmware quirk) Some laptops like to show 0% wear in BatteryInfoView - notably most HP models. In order to access the data, you must run the diagnostics (UEFI may be required) to try and dies.'''''retrieve the data, or try HP Support Assistant under battery check and find the advanced info. This is not a computer fault, but a quirk of some battery firmwares. If it cannot be accessed, mark your pack as unknown but recalibrated.'''''
If your laptop battery is inaccuratelyolder or reporting its capacity or is older,incorrectly, it may be possible to recalibrate the battery. This can correct the reported capacity or battery gauge to extend its life.the life of the battery.
[ … ]
For help understanding what calibration is, why it’s important, and how to calibrate'''''IMPORTANT: Recalibration does not save worn out batteries in other types of devices, check- it ONLY corrects the capacity. There is no way to recover a worn out battery, but the [[Battery Calibration|Battery Calibration Wiki.]]situation can be temporarily improved.'''''
[ … ]
'''''Important: Battery recalibration will not save a worn out battery.''''' This will correct the reported capacityFor help understanding what calibration is, why it’s important, and extend it’s life for a short periodhow to calibrate batteries in other types of time, but will not recoverdevices, check out the pack. '''''If there are any improvements, these capacity bumps are typically short-term.'''''[[Battery Calibration|Battery Calibration Wiki.]]
[ … ]
=== ++Guide notes++ ===
* '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!'''''
* '''''If your pack is older, consider a discharge to ~10%. These may be damaged with a full discharge.'''''
* '''''In most cases, you'''''You will likely see a capacity decrease. This is good since the capacity reported by the BMS is accurate.'''''- not bad.'''''
* '''''Avoid'''''Try to avoid using your laptop while it is charging. This may affect calibration accuracy.'''''
* If your laptop does not allow you to use it when'''''Inconsistent reporting may indicate the battery drops tois EOL. This can be delayed with proper care, but not reversed.'''''
* '''''If your battery is older, consider a certain percentage, you will need to use a workaround. This varies based on the BIOS type (UEFI or Legacy).~10% discharge. A full discharge may cause damage.'''''
=== ++How to recalibrate the battery++ ===
* Charge the laptop to 100%.
* Use the laptopit until it reports a 0% capacity and shuts down and no longer turns on.
** See '''BIOS'''''BIOS lockouts (known)'''and known OEM quirks''''' for bypasses if you use an HP orand Lenovo laptop.laptops.
* Immediately recharge the battery to start recalibration.battery. Do not use the laptop.laptop if possible.
=== ++BIOS lockouts (known)++and known OEM quirks++ ===
* '''''HP'''''(BIOS lockout) HP laptops have a 15% BIOS lockout and will need to be bypassed to dofor a full discharge.discharge.''''' Immediately charge the battery once the battery reaches 0% and the laptop shuts off.'''''off.
** '''''All HP and most Compaq laptops.'''''
* '''''(BIOS lockout)''''' Some Lenovo laptops have a ~7%7% critical low capacity errorlockout (0190). '''''This only comes up
** '''''Only occurs if the laptop is turnedshuts off beforeearly. Easily bypassed.'''''
* '''''(EOL quirk) Some Dell batteries hold incorrect data once the battery reachedis nearing the end of it’s life. This self corrects with time, or another recalibration. I have seen this on OEM Dell batteries twice - notably, the NX31D (x2 with same issue) 65Wh (2014 DOM/E6440) and a RMJFW 65Wh Extended (2014 DOM/E6220)'''''
* '''''(Battery firmware quirk) Some laptops like to show 0% wear in BatteryInfoView - notably most HP models. In order to access the data, you must run the diagnostics (UEFI may be required) to try and dies.'''''retrieve the data, or try HP Support Assistant under battery check and find the advanced info. This is not a computer fault, but a quirk of some battery firmwares. If it cannot be accessed, mark your pack as unknown but recalibrated.'''''
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