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Changes to Recalibrating laptop batteries Introduction

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If your laptop battery is inaccurately reporting its capacity or 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 [[Battery Calibration|Battery Calibration Wiki.]] [ … ] recalibration will does not save a worn out battery.''''' batteries.''''' This will correct the reported capacity and may extend it’s life for a short period of time, runtime temporarily, but will not recover the pack. '''''If there are any improvements, these are typically short-term.''''' pack. [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' your pack battery is older, consider a discharge to ~10%. ~10% discharge. These batteries may be damaged with from a full discharge.''''' * '''''In most cases, you will see a capacity decrease. This is good since the capacity reported by the BMS is accurate.''''' good, not bad.''''' * '''''Avoid using your laptop while it is charging. This may affect calibration accuracy.''''' workaround. This varies based on the BIOS type (UEFI or Legacy). '''''Workarounds for UEFI/Legacy BIOSes are provided.''''' === ++How to recalibrate the battery++ === * Charge the laptop to 100%. * Use the laptop until it reports a 0% capacity and shuts down See '''BIOS '''''BIOS lockouts (known)''' (known)''''' for bypasses if you use an HP or and Lenovo laptop. laptops. * Immediately recharge the battery to start recalibration. recalibrate. Do not use the laptop. === ++BIOS lockouts (known)++ === and will need to be bypassed bypassed''''' to do a full discharge. Immediately charge the battery once the battery reaches 0% and the laptop shuts off.''''' off. ** '''''This always happens with HP laptops unless it is bypassed.''''' * Some Lenovo laptops have a ~7% 7% critical low capacity error lockout (0190). ** '''''This only comes up occurs if the laptop is turned shuts off before the battery reached 0% and dies.''''' early.'''''
If your laptop battery is inaccurately reporting its capacity or 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 [[Battery Calibration|Battery Calibration Wiki.]] [ … ] recalibration will does not save a worn out battery.''''' batteries.''''' This will correct the reported capacity and may extend it’s life for a short period of time, runtime temporarily, but will not recover the pack. '''''If there are any improvements, these are typically short-term.''''' pack. [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' your pack battery is older, consider a discharge to ~10%. ~10% discharge. These batteries may be damaged with from a full discharge.''''' * '''''In most cases, you will see a capacity decrease. This is good since the capacity reported by the BMS is accurate.''''' good, not bad.''''' * '''''Avoid using your laptop while it is charging. This may affect calibration accuracy.''''' workaround. This varies based on the BIOS type (UEFI or Legacy). '''''Workarounds for UEFI/Legacy BIOSes are provided.''''' === ++How to recalibrate the battery++ === * Charge the laptop to 100%. * Use the laptop until it reports a 0% capacity and shuts down See '''BIOS '''''BIOS lockouts (known)''' (known)''''' for bypasses if you use an HP or and Lenovo laptop. laptops. * Immediately recharge the battery to start recalibration. recalibrate. Do not use the laptop. === ++BIOS lockouts (known)++ === and will need to be bypassed bypassed''''' to do a full discharge. Immediately charge the battery once the battery reaches 0% and the laptop shuts off.''''' off. ** '''''This always happens with HP laptops unless it is bypassed.''''' * Some Lenovo laptops have a ~7% 7% critical low capacity error lockout (0190). ** '''''This only comes up occurs if the laptop is turned shuts off before the battery reached 0% and dies.''''' early.'''''