WMMiniBattery is a Windows Mobile 2003 / WM 5.0 / WM6 software which shows the battery status at the top of the screen with a tiny (3 pixels) bar.

If the bar is tapped with the stylus, a window will pop up and show information about the battery status. Clicking on Quit, the program will close. Ok will hide the window. To modify colors and images, just edit "bar.bmp" in the program's folder (for example Program FilesWMMiniBattery). It's a Windows bitmap divided in 6 parts: critical, low, high, empty space, charging, not ready/unavailable.