Double your GoPro camera's battery life with the convenient Battery BacPac. The Battery BacPac attaches directly to your GoPro camera and goes where it goes. Perfect for long duration time-lapse photo sessions, endurance motorsports racing, or any application where you need up to twice the battery life. Compatible with all GoPro cameras. Standard and Skelton backdoor for use with a waterhousing. Includes USB cable and protective case.