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Introduction |
If your laptop battery is inaccurately reporting its capacity or it is older, it may be possible to recalibrate the battery to extend its life. | | For help understanding what calibration is, why it’s important, and how to calibrate batteries in other types of devices, check out the [https://www.ifixit.com/Wiki/[Battery_ Calibration|Battery Calibration Wiki.]] | | '''''Important: Battery recalibration will not save olda worn out batteriesbattery.''''' This will correct the reported capacity and extend it’s life for a short period of time, but will not recover the pack. '''''If there are any improvements, these capacity bumps are typically short-term.''''' | | | === ++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 varies based on the BIOS type (UEFI or Legacy). | | === ++How to recalibrate the battery++ === | | * Charge the laptop to 100%. | * Use the laptop until it reports a 0% capacity and shuts down
*/** See '''BIOS lockouts (known)''' for bypasses if you use an HP or Lenovo laptop. | | * Immediately recharge the battery to start recalibration. Do not use the laptop. | | === ++BIOS lockouts (known)++ === | | * '''''HP laptops have a 15% BIOS lockout and will need to be bypassed to do a full discharge. Immediately charge the battery once the battery reaches 0% and the laptop shuts off.''''' | | * Lenovo laptops have a ~7% critical low capacity error (0190). '''''This only comes up if the laptop is turned off before the battery reached 0% and dies.''''' |
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