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is inaccurately reporting its capacity older or is older, reporting incorrectly, it may be possible to recalibrate the battery to extend its life, battery. This can correct the reported capacity or get a better idea of extend the life left in of an old battery by correcting the pack you have. gauge. [ … ] 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 does not save worn out batteries.''''' This will correct the reported capacity and may extendFor help understanding what calibration is, why it’s runtime temporarily, but will not recover important, and how to calibrate batteries in other types of devices, check out the pack. [[Battery Calibration|Battery Calibration Wiki.]] [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' * '''''If your battery is older, consider a ~10% discharge. These batteries may be damaged from a full discharge.''''' * '''''In most cases, you '''''You will likely see a capacity decrease. This is good, good - not bad.''''' * '''''Avoid '''''Try to avoid using your laptop while it is charging. This may affect calibration accuracy.''''' * '''''Inconsistent reporting usually indicates an EOL battery. These are often uncorrectable.''''' * '''''If your battery is older, consider a ~10% discharge. A full discharge may cause damage.''''' * If your laptop does not allow you to use it when fully discharge the battery drops to a certain percentage, battery, you will need to use a workaround. '''''Workarounds for UEFI/Legacy BIOSes are provided.''''' * '''''If the capacity is inconsistent, the battery should be replaced.''''' provided.''''' === ++How to recalibrate the battery++ === 100%. * Use the laptop it until it reports a 0% capacity and shuts down and no longer turns on. ** See '''''BIOS lockouts (known)''''' and known OEM quirks''''' for HP and Lenovo laptops. * Immediately recharge the battery to recalibrate. 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 need to be bypassed''''' to do bypassed for a full discharge. discharge.''''' Immediately charge the battery once the laptop shuts off. ** '''''This always happens with '''''All HP laptops unless it is bypassed.''''' laptops/2010+ Compaq.''''' * '''''(BIOS lockout)''''' Some Lenovo laptops have a 7% critical capacity lockout (0190). ** '''''This only '''''Only occurs if the laptop shuts off early.''''' early. Easily bypassed.''''' * '''''(Known quirk) Dell batteries often hold incorrect data. This usually self corrects with a second calibration.'''''
is inaccurately reporting its capacity older or is older, reporting incorrectly, it may be possible to recalibrate the battery to extend its life, battery. This can correct the reported capacity or get a better idea of extend the life left in of an old battery by correcting the pack you have. gauge. [ … ] 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 does not save worn out batteries.''''' This will correct the reported capacity and may extendFor help understanding what calibration is, why it’s runtime temporarily, but will not recover important, and how to calibrate batteries in other types of devices, check out the pack. [[Battery Calibration|Battery Calibration Wiki.]] [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' * '''''If your battery is older, consider a ~10% discharge. These batteries may be damaged from a full discharge.''''' * '''''In most cases, you '''''You will likely see a capacity decrease. This is good, good - not bad.''''' * '''''Avoid '''''Try to avoid using your laptop while it is charging. This may affect calibration accuracy.''''' * '''''Inconsistent reporting usually indicates an EOL battery. These are often uncorrectable.''''' * '''''If your battery is older, consider a ~10% discharge. A full discharge may cause damage.''''' * If your laptop does not allow you to use it when fully discharge the battery drops to a certain percentage, battery, you will need to use a workaround. '''''Workarounds for UEFI/Legacy BIOSes are provided.''''' * '''''If the capacity is inconsistent, the battery should be replaced.''''' provided.''''' === ++How to recalibrate the battery++ === 100%. * Use the laptop it until it reports a 0% capacity and shuts down and no longer turns on. ** See '''''BIOS lockouts (known)''''' and known OEM quirks''''' for HP and Lenovo laptops. * Immediately recharge the battery to recalibrate. 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 need to be bypassed''''' to do bypassed for a full discharge. discharge.''''' Immediately charge the battery once the laptop shuts off. ** '''''This always happens with '''''All HP laptops unless it is bypassed.''''' laptops/2010+ Compaq.''''' * '''''(BIOS lockout)''''' Some Lenovo laptops have a 7% critical capacity lockout (0190). ** '''''This only '''''Only occurs if the laptop shuts off early.''''' early. Easily bypassed.''''' * '''''(Known quirk) Dell batteries often hold incorrect data. This usually self corrects with a second calibration.'''''