How to Calibrate the HP battery
When we use laptops, due to the degradation of the battery itself or errors during use, the displayed value of the battery capacity may have a large error from the actual capacity. The error in battery capacity will shorten the battery life and affect the user experience. Therefore, it is very important to calibrate the battery capacity for devices that need to use the battery for a long time.
The principle of battery capacity calibration is to balance the battery charging and discharging so that the displayed value of the battery capacity matches the actual capacity. There are professional calibration tools and manual calibration methods to calibrate the battery capacity.
NOTE: You do not need to fully charge the battery before you calibrate it. Turn on the computer and use HP PC Hardware Diagnostics UEFI to discharge the battery.
You do need to update HP PC Hardware Diagnostics UEFI to the latest version. To download the latest version, go to the
HP PC Hardware Diagnostics website. Select Diagnose PC issues outside of the OS, and then click Download.
Discharge the battery
Discharge the battery using HP PC Hardware Diagnostics UEFI.
NOTE: If the computer battery is already drained and the computer cannot turn on when you begin this procedure, wait a minimum of 5.5 hours and then go to Recharge the battery.
1. Disconnect the AC adapter.
2. Press and hold the Power button for at least five seconds to turn off the computer.
3. Turn on the computer and immediately press the f2 key repeatedly, about once every second, until the HP PC Hardware Diagnostics UEFI menu is displayed.
4. Click Component Tests in the main menu.
NOTE: The purpose is to drain or discharge the battery, not get the results of the test. The battery discharges and the computer turns off before the test results are displayed.
Selecting Component Tests in HP PC Hardware Diagnostic UEFI
5. In the list of Component Tests, click Battery.
6. On the Battery Test page, click Run once. The Battery Test begins. After the battery passes the test, click Calibrate Battery.
7. On the Battery Calibration page, click Start Calibration.
NOTE: To run battery calibration, the Battery Health Manager setting in BIOS must be Let HP manage my battery charging. If your Battery Health Manager setting is different, click Continue to change the setting when prompted.
If your AC adapter is still connected, disconnect the AC adapter, and then click Continue to continue the process when prompted.
8. HP PC Hardware Diagnostics discharges the battery and displays an estimated time to completion. After the calibration process is complete, reconnect the AC adapter and turn on the computer at the times displayed on-screen.
NOTE: The recommended times to reconnect the AC adapter and turn on the computer are usually about 6 hours after the calibration process is completed.
9. Then, recharge the battery.
Recharge the battery
Recharge the battery fully to finish recalibrating the battery.
NOTE: If you run HP Battery Check before the battery charges fully, you might get a false battery failure result.
1. Plug in the AC adapter to charge the battery.
2. Charge the battery to a full charge, 99% to 100%. This takes approximately 4 hours.
NOTE: If you are using a business notebook, make sure that you are using the Let HP manage my battery charging setting in Battery Health Manager. You must use this setting to fully charge the notebook. For more information, see Use Battery Health Manager (HP Business Notebook PCs with Windows only).
NOTE: The battery continues to charge whether the computer is on or off.
3. Check the battery charge. Turn on the computer and start Windows normally. On the desktop, hover the pointer over the battery icon in the system tray to view the battery charge percentage. Make sure that the battery charge percentage is 99% or 100%.
NOTE: If you plug in your AC adapter and immediately run the HP Battery Check, you might get a false failure showing the battery is bad. If the battery is in a low-charge state (that is, less than 3%), you might also get a false reading.
4. Wait two hours before using the notebook.
