Cell Phone Battery Charging Activation Board for Android Phone for Dormant Batteries Activation No Disassembly, battery charging board for phone Features: 1. Smart Fast Charge IC: Automatic identification for positive and negative current. 2. Fully automatic indicator light: Red: Work indicator; Blue: Full indicator light. 3. Compact and Portable: Convenient and free of disassembly, Unload the battery for charging activation. 4. When the voltage is 4.15V, the blue light will be on automatically. When the battery voltage is 4.1V, the charging will start automatically and the red light will be on. Functions of the Board: 1. Activation of dormant batteries. 2. Fast and safe battery charging. Current adjustable from 1A~3A.