Battery Monitor 1.2
the author of this app says:
Monitor battery power on your PDA device with this program from Solar. It comes with are the ability to see a graphical presentation of the capacity level and a time display that tells how long ago you recharged and the time you begin charging. Never let your battery fail you again!
This program is easy to download and install. It's quick and easy to use and you can keep it running in the background while you work, or close it to view at a later date.