Amazon.com : GoPro Battery Bacpac : Digital Camera Batteries : Electronics
GoPro Official Accessory Bundle with Battery, BacPac, Charger,
GoPro Battery BacPac - Battery charger + external battery pack - Li-Ion - 1100 mAh - for HD Helmet HERO; HD HERO; HD Hero Naked; HD HERO2; HD Naked Hero; HD Surf HERO - Walmart.com
Gopro Hero 3 Battery Bacpac Worth it? - YouTube
GoPro Hero 3 Battery BacPac - Spearfishing World
GoPro Battery BacPac for Hero 3/Hero 3+, Black | Bikeinn