windows tablet pc laptop battery tablet pc How do I maximize my run time using my Windows Tablet PC power management software? Windows Power Management allows for two power management modes,one for the internal battery and one for the AC Adapter power, or external power. It is the external power management that needs to be activated to maximize the use of the Windows Tablet PC PowerPad. The most important feature of Power Management is the Turn off Hard Disks setting. This setting should be set at the lowest time interval allowed.