The battery stays charged at 100 percent even when the Battery Care Function is enabled.

The battery will remain at 100 percent charged if the Battery Care Function is enabled while the notebook is connected to the AC power adapter. It is recommended to discharge the battery to less than 80 percent by disconnecting the AC adapter and using just battery power first before enabling the Battery Care Function.

Follow this procedure to enable or reconfigure the Battery Care Function utility settings.

1. Disconnect the AC power adapter from the notebook.
2. Allow the battery to discharge to below 80 percent.

   NOTE: If selecting the Super Battery Care Function, the battery will need to be discharged to below 50 percent.

3. Click the Start button, click All Programs, and then click VAIO Central.

   NOTE: If prompted for an administrator password or a User Account Control prompt is displayed, type the appropriate password or click Continue.

4. In the VAIO Central window, click the List tab.
5. On the List tab, double click Battery Care Function.
6. In the Battery Care Function window, click to select the box next to Enable Battery Care Function.

   NOTES:

   • There are three different options in the Battery Care Function Settings section:
     • Battery Care Function - The battery charge level will be about 80 percent of a fully charged battery, however, this mode prevents battery degradation and is more effective if you usually use the computer with battery power.
     • Super Battery Care Function - The battery charge level will be about 50 percent of a fully charged battery, however, this mode prevents battery degradation and is more effective if you usually use the computer with the AC adapter.
     • The settings for Battery Care Function on each battery - This selection gives you the ability to customize the battery settings. If this option is selected, the battery charge level can be set to either 100 percent, 80 percent or 50 percent by clicking the down arrow and selecting the desired charge level.
   • When the Battery Care Function utility is enabled and configured to any setting other than 100 percent, depending on the selection made, the battery will only charge up to the 80 percent or 50 percent charge level.

    

7. Once all desired configuration changes have been made, click the OK button.
8. In the Battery Care Function special note pop up window, click the OK button.
9. In the VAIO Central window, click the X in the upper right corner to close the window.
10. Restart the computer.