Portable power pack dual usb charger battery capacity 10 000 mah interfaces usb microusb power output max 31 dimensions 132 x 73 x 15 mm weight 211 g features battery indicator included in delivery usb cable lightning cable rechargeable battery technology li polymer output voltage 5 v operating voltage 5 v special features integrated charging cable made for ipod and iphone applications smartphone camera mp3 player tablet securities overcharge prot