Linpus Battery Optimizer is a fully featured battery management and optimization tool with several stand out features compared to other free battery apps:
Time left per app
Linpus Battery Optimizer intelligently monitors battery usage for each app over time to calculate and instantly update the length of time you can use an app for before the battery is drained. For example, want to watch a movie, it will look at how much battery you have left and estimate how many hours before the battery dies. You can therefore plan if you can watch all the movie or not, or you need to close other apps or charge.
Application management UI
Linpus Battery Optimizer lets you not only see which app is using the most power, but let you kill it immediately without having to go to another panel like so many battery apps.
Has Trickle, Fast and Full Charge stages. Many batteries appear to be full, the Trickle option means you squeeze an extra little juice into your battery before you unplug.
Power usage plans
Has Balanced, Power Save, Super Save and User Custom modes
Intelligent power saving
Can automatically disable wireless connectivity when your battery gets below a certain percentage