BATTERY TESTER - CHARGE & ACTIVATION BOARD The iCharger MEGA-IDEA is used to work with multiple smart phone batteries. using either the USB cable to your own power outlet, or using the cable with your DC power supply.  FEATURES - Use this unit to test / fast charge, and re-activate Smart Phone batteries that have gone dead due to very low charge (below safety limit). BATTERY ACTIVATION - It also has a battery activation function which when pressed can re-activate dormant battery. SUPPORTED BATTERIES - This device supports multiple android batteries for Samsung and for others, and also iPhone batteries for the following iPhone models: 5, 5s, SE, 6, 6 plus, 6s, 6s plus,7, 7 plus, 8, 8 plus, X, Xs, Xs Max, Xr, 11, 11 Pro, 11 Pro Max. LED DISPLAY - The LED display is used to display the volts and Amps.   DESCRIPTION 1. Suitable for most of smart phones 2. Auto recognize positive/negative sides of battery, make it realized being used as soon as plugged. 3. Being able to activate battery which goes to sleep, and then the battery could be used normally. 4. Charge battery which current could arrive max 2A. 5. Over current protection. When the current is over 2A, it will cut off automatically for protection. 6. Short circuit test. It could test whether the battery is at short circuit