Stay charged up with the mophie juice pack for Galaxy S8+ in black. The juice pack is a protective case that holds a 3300mAh battery, enough to nearly double your device's life. Integrated wireless charging is compatible with Qi and other systems, and built-in magnets secure your device to mophie charge force charging mounts. The case allows pass-through charge and sync while it's connected to a computer or charger via its USB Type-C port. There is also an on/off switch to save battery power when you don't need it. The LED power indicator displays the juice pack battery levels and charge status.