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.
This works great to power my phone while playing Pokémon Go. The cable it came with frayed after my second use but I use a super long cable and have no problems, works GREAT!