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Introduction |
| If your laptop battery is older or reporting incorrectly, it may be possible to recalibrate the battery. This can correct the reported capacity or battery gauge to extend the life of the battery. | | '''***''IMPORTANT: Recalibration does not saveonly corrects the capacity on worn out batteries - it ONLY corrects the capacity. There is no way to recover a worn out battery, butreverse the situation can be temporarily improvedaging process.'''''*** | | | 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 yourthe laptop while it is charging. This may affect the calibration accuracy.'''''*** | * '''***''Inconsistent reporting may indicate thean EOL battery is EOL. This can be delayed with properProper care delays this, but notit cannot be avoided or reversed.'''''*** | * '''***''If your battery is older, consider a ~10% discharge. A full discharge may cause damagekill the battery.'''''*** | | === ++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 OEMEOL quirks'''''*** for HP and Lenovo laptops. | | * Immediately recharge the battery. Do not use the laptop if possible. | === ++BIOS lockouts and known OEMEOL 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 and most Compaq laptops.'''''*** | * '''***''(BIOS lockout)'''''*** Some Lenovo laptops have a 7% critical capacity lockout (0190). | ** '''***''Only occurs if the laptop shuts off early. Easily bypassed.'''''*** | * '''***''(EOL quirk) Some Dell batteries hold incorrect data once the battery is nearing theheavily worn, or end of it’s life. This issue self corrects with time, or another recalibration. I have seen this on a few OEM Dell batteries twice - notably. Notably, the NX31D (x2DOM unknown/2x with same issue) 65Wh (2014 DOM/E6440) and a RMJFW 65Wh Extended (2014 DOM/E6220). The 45Wh 34GKR is prone to it, but to a lesser degree (2014 DOM/E7440).'''''*** | * '''***''(Battery firmwareFirmware quirk) Some laptops like to show 0% wear in BatteryInfoView - notably most HP models. In order to access the data, you must run the diagnostics (UEFI may be required) to try and retrieve the data, or try HP Support Assistant under battery check and find the advanced info. This is not a computer fault, but a quirk of some battery firmwares. If it cannot be accessed, mark your pack as unknown but recalibratedbatteries.'''''*** |
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