Phone battery standby lasting is the most difficult limitation for the smart mobile phone. Though smartphone has very high playability, because the long time lasting mobile phone playing, the battery is not durable at all. Currently, for the battery problem, power-saving software became the necessary software to be installed, so what kinds of battery savors for android mobile phones are useful? I have used several professional power-saving apps that majorly doing comprehensive energy saving, such as Purify, Best Battery Saver, BatteryBooster, and what apps will you use to save power?