Canon BG-E11 Battery Grip

By doubling the amount time you can use your camera, the less times you need to swap batteries! This battery grip is designed specially for our Mark III. This is extremely helpful when shooting in movie mode or any trip you don't have access to charge a battery. This grip also allows you to not only double the amount of battery your camera has, but you can also fill the magazine with six AA batteries for any backup situation!

B&H Link: http://www.bhphotovideo.com/c/search?Ntt=Canon+Bg-e11+Battery+Grip&InitialSearch=yes&gclid=COqBxeyds8cCFRCCaQodIoAICQ