Power your smartphone on the go with this Tzumi Pocketjuice 3488BB-3 portable charger, which features a 7800 mAh built-in battery and a 2 USB ports for charging. The rubberized coating offers easy carrying and a stylish design.
Bought this before a long road trip. Kept two devices fully charged the whole way and still had half left after about 12 hours of travel. It supports the newer faster charging but I don't have anything that uses that so I cant comment on speed but it was more than sufficient for normal charging. The device itself does take a couple hours or so to recharge but lasts long enough to just put to charge at night and no worries.