myCharge iPhone 4 Battery Case with Integrated Flip Top - White - Fits AT&T iPhone WiFi Internet up to 7.5 additional hours Video up to 7.5 additional hours Audio up to 30 additional hours Recharge the built-in battery with included USB Charging cable through standard 5V powered USB ports. Automatic shut-off once the iPhones battery has been recharged 100% Standby up to 227 additional hours Talk up to 10.5 additional hours Flip-top design for easy-on, easy off Rechargeable battery Mini USB charging port Battery indicator iPhone not included