Backup batteryfor iPod,iPhone,iPhone 3G & Cell phones Description: Light-weight, super-slim design to carry with your iPhone or iPod Conveniently charged via any USB ports High-capacity, rechargeable lithium-ion battery LED indicator for battery power level No memory effect, Li-ion battery built-in Specifications -- Battery Type: Lithium-ion battery Capacity: 1900MAH Rated input: 5V 800mA Rated Output: 5V 500mA max Charge time: Around 2 hours Dimension: 67x62x15 (mm) Color: White Compatible with: iPhone 3G 8GB/16GB iPhone 4GB 8GB 16GB iPod Touch iPod Nano iPod Classic iPod Video All kinds of cell phones,for example Nokia,LG,Samsung,Motorola,Blackberry,and etc. Package include: 1x External Backup Battery