Battery for Android is a simple yet powerful utility app. The interface is clean and everything is pleasing to the eye and well laid out.

I use a monster sized extended battery for my Galaxy S3 and this Battery app really couldn't estimate my remaining talk time properly. My estimated minutes left fluctuated drastically from one moment to the next. But I expected hiccups given the non standard battery. However, the visual battery indicator seemed accurate and is convenient for detailed visual readings, compared to squinting at the tiny battery icon in the status bar.

Alternate menus offer various readings and statistics about the battery that no one understands, cares about or even remotely needs to know. The really helpful statistics are the ones that tell you exactly what apps and processes are using the most battery power. This can be helpful if you're trying to eliminate battery hogs. But no matter how detailed all that data might be, the easiest solution is to just buy an extended battery and forget all the fuss. 7000mAh lasts days each charge, and that's with heavy use and gaming. Seems like a better solution to me.