Smart Battery Saver and Booster is a FREE power saving app that makes your battery last longer. Never worry to charge your phone in middle of the day now. This app is the most efficient and professional Android power booster, doctor and widget control manager tool that gives a longer life to your phone. You can save battery life up to 50% for your android cell phones or tablets. Don't worry about the heavy power consumption again in middle of the day. Doesn't need online connectivity to perform tasks. Works best on even non root Android phones. Leave the idea to replace your installed battery to get extra charging. Go extend battery life with deep sleep when your phone is not in use.