WF-22 battery is a External battery which manufactured by our company,it fits for mobilephone,PSP,iPOD,MP4,PDA and all kinds of laptop.The feature is high capacity((up to 2200mAh) ,Small size(only thumb sized). multi-output port( support most of palm equipment). novelty appearance, and competitively price . capacity: 2200mAH *input: 4.3~5.0V 650mA DC *output: 5.0~5.5V 1.2A *output connector type: 3.5*1.3 or USB *cycle times: >1000 times *DC/DC efficiency: ~85% *size(mm): 72*28 *weight: 45g *LED lamp: red/green *charging time: 4 hr *discharging current: <0.05mA *color: Blk/white/colorful *main accessories: charger,DCconversion plugs,input/output line