Batti is a battery indicator for PocketPC.

Features:

Small
Batti takes very few space of your PDA memory. The battery indicator itself takes about 30 KB and the whole application is less than 100 KB.

Highly configurable
Batti is highly configurable to suits your needs. You can set up the update interval of a indicator, its height, all colors are customizable and more.

Hi-DPI aware
Batti is designed in modern manners, it is ready for VGA displayes.

Custom colors
You can set colors for foreground and background, colors for low and critical battery level. You can also set the color for indicating your battery is on AC power source or that your battery is being charged.

Detailed information
Batti can show detailed information about your battery such as temperature, voltage, chemistry and some information about your backup battery as well.

Charging
Batti can indicate that your battery is being charged. If you don’t want this indication, you can easily turn it off.

Battery levels
In Batti, you can set up the value of low and critical level of your battery. Those two levels could be indicated with different colors (also configurable).

Localizations
From version 1.3, localizations are supported. You can make your own localization as well.

Sound Events
From version 1.4, you can set custom sound for entering low battery level, critical battery level, a sound for indicating the beginning of charging and a sound for notifying that your battery has been charged.

Always On Top
Batti can run as a topmost indicator, even if full screen applications are running.

http://code.google.com/p/batti/