GoPro Battery BacPac for Hero Motorsports Action Cameras
Amazon.com : SOONSUN Side Open Skeleton Housing Case for GoPro Hero 4 Black, Hero 4 Silver, Hero 3+, Hero 3 Cameras with LCD Touch Backdoor and Skeleton BacPac Backdoor for Extended Battery
Gopro Hero 3 Accessories Frame | Frame Mount Case Gopro 3 - Sports & Action Video Cameras Accessories - Aliexpress