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Introduction |
If your laptop battery is older and wish to extendinaccurately reporting it's lifecapacity or it is older, it may be possible to recalibrate the battery. This can also be used to correct an inaccurate batteryextend it's life. | | | '''Battery recalibration will not save worn out batteries.''' The capacity reported by the BMS will be corrected, but these batteries are still worn out and will need to be replaced. '''Noticeable capacity improvements are generally short term and do not last'''. | | '''Read me:''' Battery recalibration will not save worn out batteries. This will correct the reported capacity, but will not recover the pack. '''These batteries will not gain long term capacity'''. | | === ++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 will see a capacity decrease. This is good since the capacity reported by the BMS is accurate.''' | | * '''Avoid using your laptop while it is charging. This may affect calibration accuracy.''' | | * If your laptop does not allow you to use it when the battery drops to a certain percentage, you will need to use a workaround. This may vary based on the BIOS (UEFI or Legacy). | | | === ++Guide notes++ === | | * '''''If your battery exceeds 30-40 °C/86-104 °F, REPLACE THE BATTERY!''''' | | * '''If your pack is older, use caution or consider discharging the battery to ~10%. A full discharge may damage older batteries.''' | | * '''In most cases, you will see a capacity decrease. This is good and means the information reported to the BMS is accurate.''' | | * '''Avoid using your laptop while it is charging. The calibration accuracy may be affected.''' | | * If your laptop does not allow you to use it when the battery drops to a certain percentage, you will need a workaround to drain the battery to 0%. This may vary based on the BIOS type (UEFI or Legacy). | | | '''How to recalibrate the battery''' | | === ++How to recalibrate the battery++ === | | * Charge the laptop to 100%. | | * Use the laptop until it reports a 0% capacity and shuts down*/**. | | * Immediately recharge the battery to start recalibration. Do not use the laptop. | === ++Known BIOS lockouts (known)++ === | '''*HP laptops have a 15% BIOS lockout and will notneed to be bypassed to turn on without being bypassed. Immediately rechargecharge the battery once the laptop is atbattery reaches 0% capacity and shuts downoff.''' | **Lenovo laptops have a ~7% critical lockout. '''This only becomes an issuecomes up if the laptop is turned off earlybefore 0% charge.''' |
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