It is a perfect battery pack for your GoPro Hero 3 camera. These batteries are easy to use; you may follow the instruction for charging the batteries. It has a relatively long life span as compared to other batteries. So you can use this battery for shooting long segments. In the pack a rapid charger with US plug is available. Batteries power is 1290 mAh with dual channel charger and one USB cable. 24/7 support service is available. You can buy Smatree batteries on Amazon. Customer reviews are positive and no fault has yet been reported.