... USB charge port; To power up and charge cell phone,digital camera,Ipod,iphone,PDA,MP3,PMP,PSP etc ... With USB charge port;To power up and charge cell phone,digital camera,Ipod,iphone,PDA,MP3,PMP,PSP etc ... . Models: D3909A.Specifictions: weight37:g; Capacity:950mah; Cell type:Li-Polymer battery; Dimension:61.5*38.2 ... ; Cycle life:500 timesFuction&Character:Pocket sizePortable External battery for cell phone