GoPro's Battery BacPac attaches to a GoPro camera to double its battery life. This accessory is perfect for long duration time-lapse photo sessions, endurance racing or any application where you need up to 2 times the battery life. This option is compatible with all GoPro cameras.
Battery BacPac with integrated rechargeable Li-ion Battery, rear recording light and LCD display
Standard + Skeleton backdoor for use with waterhousing