The clever, lightweight and powerful MagicMount PowerBank provides 4000mAh of power from a portable, compact design. Securing seamlessly to your Samsung or other Micro USB device with its powerful Rare-Earth Magnet, this low profile charger will significantly extend your phone's battery life.  Its 4000mAh lithium-ion battery is fully rechargeable and provides a 2.1 Amp output. The included MagicPlates allow for a variety of placement options, and there is also a micro USB to charge the PowerBank  itself. Compatible with:_ Samsung Galaxy S7/ S7 Edge_ Samsung Galaxy S6/S6 Edge_ Samsung Galaxy S5_ Samsung Galaxy S4