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Introduction |
| If your laptop battery is older (and you wish to get a little more use out of it) or has an inaccurately reported capacity, it may be possible to correct the problem by recalibrating the battery. | | '''NOTEImportant:''' '''Battery recalibration will not save a worn out battery. It''' The capacity reported by the BMS will correct the capacitybe corrected, but anyit will not repair these batteries. Any capacity improvements are likely short term and will not be appreciablenegligible. This procedure only corrects the capacity reported to the BMS. | | | ++ '''Guide notes''' ++ | * '''WARNING:''' If your battery exceeds 30-40 °C/86-104 °F, REPLACE THE BATTERY!''''' | * '''If your pack is older, use this procedure with caution. This procedure may damage a worn out batteryolder batteries.''' | * If your laptop does not allow you to use it when the battery drops to a certain percentage (notably HP), you will need to find a workaround to drain the battery to 0%. This variesmay vary based on if your system uses a the BIOS type (UEFI or Legacy BIOS). | * In most cases, you will see sa capacity decrease. This is good and means the information reported to the BMS is accurate. | | * Try to avoid using your laptop while it is charging. This may impact the post 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, chargeimmediately recharge the battery to 100% (ideally uninterrupted). | | === Known BIOS lockouts === | **HP laptops have a ~15% BIOS lockout and automatically turn off. Plug the laptop in and need to wake it up and drain it to 0% once it is running againbe bypassed. '''Immediately recharge the battery once the laptop is at 0% capacity and shuts down.'''. | | ***Lenovo laptops have a ~7% critical lockout. This only kicks in if the laptop is turned off. |
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