bought a pebble portable charger from groupon a while ago..
its very small and it comes with alot of charger heads you can attach with to all your devices.. it also comes with a little sock which is very cute..
i love this device.. you just plug it thru usb either thru your PC or a usb wall charger and it self-charges it will light up blue while its charging and turn red wen its full and then your ready to go.. you can charge your phone on the go.. i always keep it in my bag just incase..
the only downside to it is.. it charges your device very slowly.. i charged my boyfwens phone.. from 7%- 67% overnight.. which is super slow.. and also it can unplug itself pretty easy if you leave it in your bag charging but overall its pretty handy!
would recommend xx