How to Format a Compaq Battery

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How to Format a Compaq Battery
Rechargeable batteries power laptops away from electrical sockets. (battery image by Aditia Patria Warman from

Compaq laptop batteries need occasional maintenance to continue working properly in the PC. When you charge and drain the laptop repeatedly in a short time frame, the rechargeable battery might cause the power meter to display the wrong charge level percentage. This incorrect power reading could cause an inconvenience when you use the laptop for a long stretch, such as a PowerPoint presentation, but it unexpectedly loses power midway. Hewlett-Packard recommends that Compaq users fully charge and discharge the battery to format or "calibrate" it to yield correct power levels.

Skill level:


  1. 1

    Connect the Compaq computer to the power adaptor. Charge to between 99 and 100 per cent capacity. Click the "Power" icon on the taskbar in the Windows operating system to check the percentage.

  2. 2

    Disconnect the power adaptor from the laptop.

  3. 3

    Click the Windows "Start" logo at the bottom left corner of the desktop. Type "power" in the search box at the bottom of the "Start" menu. Click "Power Options."

  4. 4

    Click "Create a Power Plan" in the left pane of the window.

  5. 5

    Move the cursor to the "Plan Name" field. Type "Calibrator," then press the "Enter" key.

  6. 6

    Click "Never" for each topic under the "On Battery" column. Click "Create." Wait while the battery discharges its power and shuts down.

  7. 7

    Reconnect the power adaptor. Restart the laptop. Access "Power Options" again and change to the default power setting.

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