WIRELESS ONE IPACKMINI iPhone 4/4S Portable Battery • Fits iPhone(R) 4/4S • High Capacity Backup Battery Charger • Built-In 30-Pin Dock Connector & Micro Usb Charging Cable • Charges 2 Devices Simultaneously • Fashionable Led Power Screen Shows Remaining Power Level • Compact Form & Light Weight Allow Portable Charging • Li-Ion Battery • 3.7V/5,000 Mah • Charging Time: Approx. 6 Hours • Standby Time: Up To 78 Hours