Keep losing power get theultra thin polymer power bank for mobile phoner available in 3 colours rose red black and goldr easy to use just plug it inr ultra thin lightweight and portabler has a standard usb output interfacer please see full details for product specificationsr ideal for mobile phones mp3 players tabletsr r buying optionsr r 999 pound instead of 4999 pound for 1 power bank save 80r 1899 pound instead of 9998 pound for 2 power banks