Portable Emergency AA Battery Charger Extender suitable for the GoPro Hero3 - with Gomadic Brand TipExchange Technology
Amazon.com : Kastar GOPRO3 Battery (3-Pack) and Charger Kit for GoPro HD HERO3, HERO3+, AHDBT-302 Work with GoPro AHDBT-201, AHDBT-301, AHDBT-302 : Electronics