... can be just attached perfect Attachable Battery Pack for iPhone and iPodFeatures: 1,Made for iphone4,3G.3GS,touch 2,Patent ... for overcharging, temperature, short- circuit….. 3,LED light 4,Non-slip grip design Product Modle:T4 Color :white Battery:Lithium-polymer battery ... function the side, used for data transmission or charging 1500mA Attachable Battery Pack plus Sync Cable Made for iphone, iPod touch