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crwdns2944351:0crwdnd2944351:0Recalibrating laptop batteries - READ FOR HP MACHINEScrwdnd2944351:0crwdne2944351:0

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Introduction
If your laptop battery is a couple of years old and suspect the accuracy is incorrect, the battery can be recalibrated to correct the accuracy.
 This is not a solution you can use to avoid replacing a battery that's beginning to wear out but can'''NOTE: Battery recalibration cannot be used to get an idea of how much life is leftsave a failing battery. While it will correct these packs to give you an idea how much life is left, anycapacity increases will not be appreciable.

'''Note: This processalso does NOTnot restore lost capacity. It is meant to; it will correct the capacitywhat is reported by the BMS.'''
++ '''Guide notes''' ++
* '''WARNING: If your battery exceeds 30-40 °C/86-104 °F, the battery should be treated as damaged and be replaced!'''
* '''Use this procedure with caution on worn out batteries. If this damages your battery be prepared to replace it.'''
* If your laptop does not allow you to use it when the battery hits a certain percentage (notably HP), you will need to find a workaround to calibrate the battery correctly. This will vary based on the BIOS type (UEFI or Legacy).
* In most cases, you will see a capacity decrease. This is good since the reported wear is now correct.
* Try to avoid using your laptop while it is charging. This may impact the calibration accuracy.
'''How to recalibrate the battery'''
* Charge the laptop to 100%.
* Use the laptop until it's at 0% and shuts down**/***.
* Immediately recharge the battery. To recalibrate the battery, charge the battery to 100%.
**HP laptops have a ~15% BIOS lockout. For these laptops, and require a workaround is required.. Use the laptop until the battery hitsreaches 0% and shuts off. Immediately charge the laptop until it is fully charged.
***Lenovo laptops have a ~7% critical lockout, but it does not apply unless the laptop is shut down at that percentage level.