Fuel Max Battery Extender Case for Iphone 4 1900 Mah Lithium-ion Battery - 230 Hours Standby Time - Color Black Act as a protect case for iPhone 4. Recharges the iPhone 4 on-the-go with a battery capacity up to 1900 mAh (Lithium-ion) Completely encases and protects the iPhone 4, including corners. Access to all ports and controls Power on/off button and LED lights to indicate charge levels make for optimal efficiency. Charge with Micro USB (USB Cable included). Black impact resistant shell Product Compatibility:iPhone 4G Stand By Time: up to 230 hours Talk time: up to 6 hours Internet use: up to 5.5 hours on 4G up to 8 hours on Wi-Fi Audio play: up to 30 hours Video play: up to 8 hours. Includes 1 x Fuel Max Battery Case for iPhone 4 (Black) 1 x Micro USB Cable 1 x User Manual