Power tube battery capacity 3 200 mah interfaces usb microusb power output max 12 dimensions 99 5 x 25 4 mm weight 78 g features battery indicator onoff switch included in delivery micro usb cable colour blue rechargeable battery technology li ion output voltage 5 v operating voltage 5 v compatible smartphones samsung galaxy s4 nokia lumia 635 nokia lumia 625 lg g2 nokia lumia 1020 applications smartphone camera mp3 player