Skip to main content

Fix Your Stuff

Right to Repair

Store

Changes to Recalibrating laptop batteries Introduction

Edit by Nick

Edit approved by Nick

Before
After
Unchanged
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.]] [ … ] '''''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.'''''
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.]] [ … ] '''''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.'''''