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or battery gauge to extend the life of an old battery by correcting the gauge. battery. [ … ] '''''IMPORTANT: Recalibration does not save worn out batteries - it ONLY corrects the capacity. There is no way to recover a worn out battery, but the situation can be temporarily improved.''''' [ … ] 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.]] [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' * '''''You will likely see a capacity decrease. This is good - not bad.''''' * '''''Try to avoid using your laptop while it is charging. This may affect calibration accuracy.''''' reporting usually indicates an EOL battery. These are often uncorrectable.''''' may indicate the battery is EOL. This can be delayed with proper care, but not reversed.''''' * '''''If your battery is older, consider a ~10% discharge. A full discharge may cause damage.''''' * If your laptop does not allow you to fully discharge the battery, you will need a workaround. '''''Workarounds for UEFI/Legacy BIOSes are provided.''''' === ++How to recalibrate the battery++ === * Charge the laptop to 100%. Use it until it shuts down and no longer turns on. ** See '''''BIOS lockouts and known OEM quirks''''' for HP and Lenovo laptops. * Immediately recharge the battery. Do not use the laptop if possible. === ++BIOS lockouts and known OEM quirks++ === * '''''(BIOS lockout) HP laptops have a 15% BIOS lockout and need to be bypassed for a full discharge.''''' Immediately charge the battery once the laptop shuts off. ** '''''All HP laptops/2010+ Compaq.''''' * '''''(BIOS lockout)''''' Some Lenovo laptops have a 7% critical capacity lockout (0190). ** '''''Only occurs if the laptop shuts off early. Easily bypassed.''''' quirk) Some Dell batteries often hold incorrect data. data once the battery is nearing the end of it’s life. This usually self corrects with time and a second calibration.''''' later recalibration. I have seen this on a Dell NX31D (2014/E6440) and a RMJFW(2014/E6220)'''''
or battery gauge to extend the life of an old battery by correcting the gauge. battery. [ … ] '''''IMPORTANT: Recalibration does not save worn out batteries - it ONLY corrects the capacity. There is no way to recover a worn out battery, but the situation can be temporarily improved.''''' [ … ] 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.]] [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' * '''''You will likely see a capacity decrease. This is good - not bad.''''' * '''''Try to avoid using your laptop while it is charging. This may affect calibration accuracy.''''' reporting usually indicates an EOL battery. These are often uncorrectable.''''' may indicate the battery is EOL. This can be delayed with proper care, but not reversed.''''' * '''''If your battery is older, consider a ~10% discharge. A full discharge may cause damage.''''' * If your laptop does not allow you to fully discharge the battery, you will need a workaround. '''''Workarounds for UEFI/Legacy BIOSes are provided.''''' === ++How to recalibrate the battery++ === * Charge the laptop to 100%. Use it until it shuts down and no longer turns on. ** See '''''BIOS lockouts and known OEM quirks''''' for HP and Lenovo laptops. * Immediately recharge the battery. Do not use the laptop if possible. === ++BIOS lockouts and known OEM quirks++ === * '''''(BIOS lockout) HP laptops have a 15% BIOS lockout and need to be bypassed for a full discharge.''''' Immediately charge the battery once the laptop shuts off. ** '''''All HP laptops/2010+ Compaq.''''' * '''''(BIOS lockout)''''' Some Lenovo laptops have a 7% critical capacity lockout (0190). ** '''''Only occurs if the laptop shuts off early. Easily bypassed.''''' quirk) Some Dell batteries often hold incorrect data. data once the battery is nearing the end of it’s life. This usually self corrects with time and a second calibration.''''' later recalibration. I have seen this on a Dell NX31D (2014/E6440) and a RMJFW(2014/E6220)'''''