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Recalibrating laptop batteries

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  1. Recalibrating laptop batteries, Log the original calibration data: 1 단계, 이미지 1/1
    • This battery is too far gone for recalibration.

    • Before recalibrating the battery, charge the battery to 100%. Take a note of the initial data.

  2. Recalibrating laptop batteries, Use your laptop: 2 단계, 이미지 1/3 Recalibrating laptop batteries, Use your laptop: 2 단계, 이미지 2/3 Recalibrating laptop batteries, Use your laptop: 2 단계, 이미지 3/3
    • Any data from this step will be lost. Only plug the laptop in to get the machine started from a BIOS lockout.

    • If you are using a Windows laptop, make sure you turn the laptop back on after the initial shutdown. Windows is designed to shut down when the battery in the laptop reports ~3% remaining capacity. This may require brief use of the power adapter if the laptop does not turn on until the charge is higher or it has AC power.

    • Use your laptop while it is discharging. You will want to do this until the computer shuts down, and if you are using Windows turn it on again until the laptop no longer turns on; this ensures a full discharge.

  3. Recalibrating laptop batteries, Plug your laptop in: 3 단계, 이미지 1/2 Recalibrating laptop batteries, Plug your laptop in: 3 단계, 이미지 2/2
    • While it is safe to use your laptop, the calibration accuracy may be affected.

    • Every laptop has a different charge indicator. When your laptop is fully discharged, plug it in immediately. Fully charge the laptop.

  4. Recalibrating laptop batteries, Verify the new calibration data: 4 단계, 이미지 1/1
    • This procedure may "kill" end of life batteries.

    • Once you are finished, check the BMS data. The reported data should be corrected.

  5. Recalibrating laptop batteries, (Windows 10) Battery health check: 5 단계, 이미지 1/3 Recalibrating laptop batteries, (Windows 10) Battery health check: 5 단계, 이미지 2/3 Recalibrating laptop batteries, (Windows 10) Battery health check: 5 단계, 이미지 3/3
    • This may not work if your battery is older, even if it is an OEM pack.

    • Run Command Prompt as an administrator. Enter powercfg /batteryreport.

    • When the report is ready, you will receive a message stating where it is located. Check the data for consistency.

  6. Recalibrating laptop batteries, (HP UEFI) 15% lockout bypass: 6 단계, 이미지 1/3 Recalibrating laptop batteries, (HP UEFI) 15% lockout bypass: 6 단계, 이미지 2/3 Recalibrating laptop batteries, (HP UEFI) 15% lockout bypass: 6 단계, 이미지 3/3
    • This will fully discharge the battery. HP diagnostics do not check the charge capacity.

    • Plug the laptop in and turn it on; unplug it once it is on. Press ESC and select System Diagnostics.

    • Open the Component tests submenu. Select Memory or Hard Drive.

    • Select Extensive test. Choose Loop until error.

    • When the laptop shuts off, immediately recharge the battery.

  7. Recalibrating laptop batteries, (HP Legacy BIOS) 15% lockout bypass: 7 단계, 이미지 1/3 Recalibrating laptop batteries, (HP Legacy BIOS) 15% lockout bypass: 7 단계, 이미지 2/3 Recalibrating laptop batteries, (HP Legacy BIOS) 15% lockout bypass: 7 단계, 이미지 3/3
    • DO NOT apply these settings to your primary OS. They may damage the battery.

    • Boot the laptop into a live Linux Mint Cinnamon session. Open Settings and make the following changes:

    • Open Power Management. Change When the battery is critically low to Do nothing.

    • Use the laptop until it shuts down. Everything from this session will be lost.

  8. Recalibrating laptop batteries, (Lenovo 0190) Critical low battery bypass: 8 단계, 이미지 1/3 Recalibrating laptop batteries, (Lenovo 0190) Critical low battery bypass: 8 단계, 이미지 2/3 Recalibrating laptop batteries, (Lenovo 0190) Critical low battery bypass: 8 단계, 이미지 3/3
    • Plug the power adapter into your laptop. Allow POST to finish before unplugging the laptop.

    • Disconnect the laptop once the laptop is booted. Finish discharging the battery.

  9. Recalibrating laptop batteries, (Optional) Label the battery: 9 단계, 이미지 1/2 Recalibrating laptop batteries, (Optional) Label the battery: 9 단계, 이미지 2/2
    • To better track the estimated health of the battery, labeling is recommended.

    • Note the date of the recalibration.

    • Note the original charge capacity (Designed capacity).

    • Note the current capacity of the battery (Full charge capacity).

결승점

다른 14명이 해당 안내서를 완성하였습니다.

Nick

회원 가입일: 11/10/09

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댓글 4개

Did not help at all.

I have a Windows tablet, pretty old one - previously it was showing 39% battery wear (it actually was holding for about an hour, battery itself is a bir inflated).

A couple days ago it hard crashed and wear level was reseted to 0%. Now some weird stuff started: turning off when reaching 14% battery charge, screen dimming etc.

Tried this method, and as I said in the beginning - it did not help, still shows 0% wear.

Ослик Иа - 답글

Late response, but some laptops and Windows based tablets (notably HP) always show 0% wear in Batteryinfoview. You need to go into the UEFI diagnostics or use use HP Support Assistant and grab it from the advanced data on HP. If it’s Dell, UEFI SupportAssist (newer systems) or ePSA (legacy).

Nothing to worry about, but another quirk like the EOL capacity reporting response on some Dell batteries. Added a note in the quirks section about this.

Nick -

I’m curious, can we send command through the I2C interface from the laptop itself to the battery and do some calibration from there? is the built-in BMS has the capability to do that?

putraadriansyah08 - 답글

May battery charging shows 39% and it should be always plug in (windows 11) on Asus laptop.

Badri Momeni - 답글

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