Battery Max is a complete iPhone/iPod Touch/iPad device's battery monitoring app, that lets you know about the current battery level and estimated time to charge your battery to full.

Tap on the battery to see the cool 3D battery open animation, which shows the battery usage details for various apps including youtube, audio play, wifi and 3g usage etc.

"Low battery level" lets you to choose a warning level for your battery. When the battery goes below this level you will be warned of low battery.