High Quality 1800mAh External Battery Pack Portable Power Bank Charger For Apple iPhone 4S iPhone 4 (AT&T Sprint and Verizon) and iPod Touch (1G 2G 3G 4G) Simply charge this iPhone Case Charger from your PC using the provided USB Cable until it is full; then simply charge your device whenever you need power. Rechargeable Lithium-Ion 1800mah battery pack increases energy efficiency. Great for traveling and long flight - for your iPhone 4S iPhone 4 iPod Touch Compact size allow easily carry in bags, pant pockets, or shirt pocket 3 LED battery meter displays remaining power level. Material: ABS+ piano finishing