its life. life, or get a better idea of the life left in the pack you have. [ … ] 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.]] [ … ] '''''Important: Battery recalibration does not save worn out batteries.''''' This will correct the reported capacity and may extend it’s runtime temporarily, but will not recover the pack. [ … ] === ++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 will see a capacity decrease. This is good, not bad.''''' * '''''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. '''''Workarounds for UEFI/Legacy BIOSes are provided.''''' * '''''If the capacity is inconsistent, the battery should be replaced.''''' === ++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 HP and Lenovo laptops. * Immediately recharge the battery to recalibrate. Do not use the laptop. === ++BIOS lockouts (known)++ === * '''''HP laptops have a 15% BIOS lockout and need to be bypassed''''' to do a full discharge. Immediately charge the battery once the laptop shuts off. ** '''''This always happens with HP laptops unless it is bypassed.''''' * Some Lenovo laptops have a 7% critical capacity lockout (0190). ** '''''This only occurs if the laptop shuts off early.'''''