Battery Saver is a great way to improve your battery life. Using its profiles, you can maximize your battery life by automatically stopping battery hogging settings and apps.

★ If you’re looking for an easy battery saving app, Rocket: Battery Saver, Booster is definitely worth giving a shot. - thetechhacker
http://thetechhacker.com/2014/10/13/rocket-battery-saver-boosterandroid-app-review/

★ Simple, lightweight.. no-frills battery caretaker - phoneArena
http://www.phonearena.com/news/Rocket-Battery-Saver-is-a-simple-lightweight-free-ad-free-Android-battery-caretaker_id65878

Highlights
- Create powerful profiles to automatically stop battery consuming services and apps. You can schedule your profiles to increase your battery life when your battery dips below a certain level, at a specific time of the day, or when your screen is off.
- Monitor your battery levels with a beautiful timeline, and easily view the current trends.
- Conveniently view accurate information of the time remaining and percent % of your battery. With its notification, battery estimates are at your fingertips.