I purchased a GoPro Battery BacPack recently because I realized that I’d rather have extended shooting than have two seperate batteries that needed to be charged. I had already purchased a second standard battery for the GoPro, but I didn’t have a way to charge it when it was not in the camera, so found it less useful than I was hoping.
The fact that I am most often using my GoPro in harsh conditions means that I’d rather not open the case any more frequently than I need to. When I’m skiing, if I go into the lodge to change the battery, the very first thing I notice is that the cold GoPro case is suddenly steamed over by the indoor humidity.
When I’ve been doing my stop motion photography at a picture every two seconds, generally the standard battery lasts just under two hours. My first test with the BacPac attached started at 8:47am and the last picture was at 12:40, so it looks like It gets me to just under 4 hours total.
It created 6999 files in that time frame. I’ve not figured out if the GoPro uses any less battery when taking sequential still photos vs when it’s taking movies.
Saturday’s race on Different Drummer wasn’t fully captured in the time allotted because we went out early and did some practice work flying the spinnaker.