8/7/2019 Calibrating the Notebook Battery - HP Customer Care (United States - English)

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Calibrating the notebook battery

Calibrate the battery while PC is in use

Calibrate the battery while PC is not in use

This document pertains to HP Notebook PCs with Windows 7 and Vista.

Calibrating the notebook battery

Calibrating the battery means recharging the battery to its maximum capacity and resetting the

battery gauge to display the level of charge accurately.

The Windows sy stem tray battery meter may not correctly display the battery charge level when a

notebook is new or has not been used for a long period of time. I f the battery gauge becomes

inaccurate, use one of the methods below to calibrate the battery gauge reading.

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Calibrate the battery while PC is in use

A calibration cycle requires that the battery be completely charged and then completely discharged.

During the calibration cycle, the power management properties must be disabled to allow the battery tocompletely discharge.

Follow the steps below to calibrate the battery power meter readings.

Connect the AC adapter and allow the battery to charge to 99% - 100% of capacit y.1.

Disconnect t he AC adapter from the notebook PC.2.

Click Start , enterp o w e r in the Search field, and then selectPower Options f rom the

list.

3.

Select Create a power plan f rom the lef t sidebar.4.

Click in the Plan name field and type C a l i b r a t o r . Then, press E n t e r .5.

Select Neverf or all topics in theOn battery column.6.

Click Create to accept the values and force the battery to consistently discharge.7.

Allow the battery to discharge completely until the notebook PC shuts down.

NOTE: The battery power meter is now calibrated, and the battery level readings

should be accurate.

8.

Connect the AC adapter and restart the notebook PC.9.

Aft er calibration, return to thePower Options dialog box (Step 3) and select your default

power plan setting.

10.

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Calibrate the battery while PC is not in use

A calibration cycle requires that the battery be completely charged and then completely discharged.

The calibration may t ake one to f ive hours, depending on the age of t he battery and the notebook

configuration.

Follow the steps below to calibrate the battery power meter readings.

NOTE: Do not use the PC during the calibration cy cle.

Shut down the notebook PC.1.

Connect the AC Adapter and charge the notebook PC until the battery charge light is green,

indicating that the battery is completely charged.

On some models the battery light glows white, and on other models the light turns of f when

f ully charged. See your model's User Guide.

2.

Restart the notebook.3.

Press F 8 several times when the HP logo appears.4.

When the Windows Advanced Boot Options menus displays, use the Up and Down arrow5.

Calibrating the Notebook Battery

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rating the Notebook Battery - HP Customer Care (United States - .. . http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&d

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8/7/2019 Calibrating the Notebook Battery - HP Customer Care (United States - English)

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keys to select Safe Mode and then pressE n t e r

.

When the Windows Advanced Startup Menu displays, select the Startup in Safe Mode option.6.

Disconnect t he AC power adapter f rom the notebook PC.7.

Allow the battery to discharge completely until the notebook PC shuts down.8.

The battery is now calibrated, and the battery level reading on the power meter should be accurate.

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rating the Notebook Battery - HP Customer Care (United States - .. . http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&d

30/03/20