Amazon.com : Complete AC/ DC Power Kit for GoPro Hero 3+ and Hero 4 (Not compatible with Hero 3 & older) Includes USB Power Cable,Water-resistant Backdoor Passthrough,and 3 Adapter Plugs (US &
GPC GoPro Connector video out/charging connector for Hero 1, 2,3,3+,4 - RangeVideo
Portable Emergency AA Battery Charger Extender suitable for the GoPro Hero3 - with Gomadic Brand TipExchange Technology