 "GoPro Battery BacPac (Camera Not Included)" "Pedometers - Page 3 | All Fitness Gadgets"
"The Battery BacPac is a removable battery pack that seamlessly attaches to the back of your GoPro to increase battery life. Now featuring 15% more battery capacity than the previous model, it's perfect for all-day adventures, marathon surf sessions or any application where you need extended battery life. Itâ€™s also ideal for activities where charging or swapping in a fresh battery is difficult, like scuba diving and overnight backpacking. You can charge it with any standard USB charger, the GoPro Auto or Wall Charger,1 or a computer.2" 
 "CANON 1133B001AA CB-2LX Battery Charger (1133B001AA)" (1133B001AA) from Solid Signal"
"The Canon CB-2LX Compact Battery Charger is designed to take full advantage of high capacity rechargeable batteries. It has been specially designed to charge the Canon NB-5L Battery." 