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Changes to Recalibrating laptop batteries Introduction

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Introduction
If your laptop battery is inaccurately reporting its capacity or is older, it may be possible to recalibrate the battery to extend its life. [ … ] 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.]] [ … ] these capacity bumps are typically short-term.''''' [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' * '''''If your pack is older, consider a discharge to ~10%. These may be damaged with a full discharge.''''' * '''''In most cases, you will see a capacity decrease. This is good since the capacity reported by the BMS is accurate.''''' * '''''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. This varies based on the BIOS type (UEFI or Legacy). === ++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 bypasses if you use an HP or Lenovo laptop. * Immediately recharge the battery to start recalibration. Do not use the laptop. === ++BIOS lockouts (known)++ === * '''''HP laptops have a 15% BIOS lockout and will need to be bypassed to do a full discharge. Immediately charge the battery once the battery reaches 0% and the laptop shuts off.''''' * Lenovo laptops have a ~7% critical low capacity error (0190). '''''This only comes up if the laptop is turned off before the battery reached 0% and dies.'''''
If your laptop battery is inaccurately reporting its capacity or is older, it may be possible to recalibrate the battery to extend its life. [ … ] 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.]] [ … ] these capacity bumps are typically short-term.''''' [ … ] === ++Guide notes++ === * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' * '''''If your pack is older, consider a discharge to ~10%. These may be damaged with a full discharge.''''' * '''''In most cases, you will see a capacity decrease. This is good since the capacity reported by the BMS is accurate.''''' * '''''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. This varies based on the BIOS type (UEFI or Legacy). === ++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 bypasses if you use an HP or Lenovo laptop. * Immediately recharge the battery to start recalibration. Do not use the laptop. === ++BIOS lockouts (known)++ === * '''''HP laptops have a 15% BIOS lockout and will need to be bypassed to do a full discharge. Immediately charge the battery once the battery reaches 0% and the laptop shuts off.''''' * Lenovo laptops have a ~7% critical low capacity error (0190). '''''This only comes up if the laptop is turned off before the battery reached 0% and dies.'''''