Calibrate the notebook PC battery

Short discharges and recharges do not fully synchronize the battery's fuel gauge with the battery's state-of-charge. This can result in the amount of power available in one cycle being less than expected or the battery meter being inaccurate.

Under normal usage, batteries should be calibrated a minimum of once every 3 months. Your battery can be calibrated by following these steps:

Step 1 - Disable the Windows Power Management

• In Windows, right-click the Desktop and select Properties in the menu list.
• Click the Screen Saver tab and then click the Power button.
• Under Power schemes, select Always On in the drop down menu.
• Under Settings for Always On power scheme, select Never in each of the drop down menus.
• Click OK on the Power Options Properties window and then click OK on the Display Properties window.

Step 2 - Fully charge the battery

• Connect the AC adapter to the notebook.
• Charge the battery until the Windows battery meter is at 100%.

Step 3 - Fully discharge the battery

• Remove the AC adapter.
• Keep the notebook on until the battery has completely drained and the notebook automatically turns off.
• Connect the AC adapter to the notebook.
• Keep the AC adapter connected to the notebook until the battery has completely charged.

Step 4 - Enable the Windows Power Management

• In Windows, right-click the Desktop and select Properties in the menu list.
• Click the Screen Saver tab and then click the Power button.
• Under Power schemes, select Portable/Laptop in the drop down menu.
• Click OK on the Power Options Properties window and then click OK on the Display Properties window.

Note: After completing the steps above, your notebook PC battery will be calibrated.

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