Windows® CE 3.0 Application Programming

Power Management

Windows CE carefully monitors and controls the power consumption of the device to ensure maximum battery life. Windows CE makes the following assumptions about typical use when adopting a power management strategy:

• Typical use is less than two hours a day in bursts from five minutes to one hour at a time.

• The display is on 100 percent of the time during use.

• The CPU is on less than 10 percent of the time during typical use.

Battery life can be severely impacted by PCMCIA and Compact Flash modems and network cards. Serial communications can also drain the battery, especially if the device being communicated with does not supply power for the serial lines.

Power Management States

Windows CE automatically selects the appropriate power ...