Battery Time Saver & Optimizer - Went camping, or just walking down the street, and suddenly you have suddenly dead battery? This is not a problem with this app your smartphone will be able for long to maintain its primary function is the ability to call and text message. Turning off all unnecessary battery consumption will be greatly reduced, and for a while your device is still live. However, this application also performs another very good function. It will show you approximately how much time will keep the battery but if you connect it to the charger, you know exactly how much you can expect a full charge.