GoPro Battery BacPac
The Battery BacPac works as both a charger for your spare Hero3 batteries and plugs into the back of the Hero3 camera to nearly double record times. Perfect for long duration time-lapse photo sessions, endurance motorsports racing or any application where you need up to 2X the battery life.
What's in the box:
Due to manufacturer restrictions we can only ship this item within the U.S.
Originally I bought every single adapter and mount thinking that was the best way to enjoy my camera. Boy I was wrong. Having to stop and change batteries on long rides was frustrating. With this back pack problem solved. It is a bit heavier when you use the helmet mount, but I got used to it fast... recently took it on a 5 hour ride no issue and finished with plenty battery