Portable power pack dual usb charger charging capacity indication iphone 3gis 1150mah iphone 4s batteryis 1 432mah ipad 5400 mah ipad2 6930mah ipad 3 11 666mah ipad mini 4490 galaxy s3 2100 mah battery capacity 6 600 mah interfaces microusb usb interace output 2x usb type a features battery indicator lcd display colours black blue material aluminium applications smartphone camera mp3 player