The myCharge HOME & GO Lightning Rechargeable 4000mAh Battery provides up to 2x extra battery. The input is 100-240VAC. It has an integrated lightning cable and 1 USB-A port. It recharges via built-in wall prongs. Features include: 1) Smart sense - Ensures complete device compatibility, 2) Hyper charge - Ultra fast charging of your devices, 65% faster than competitors, 3) High density battery - The smallest and lightest powerbank, 4) Safe cell - Provides the highest level of battery safety.