the author of this app says:
System Info is a utility that allows you to see the current system status of your Handheld PC. An icon is placed in the system tray while System Info is running. This icon represents the status of your batteries. If you are plugged into power, an AC icon will appear. While running on batteries a battery is displayed. The battery contains bars representing 0-100 percent battery power remaining.
- 2.0 and Above