Why isn't anybody using the 6V 42ah battery? I have two Gocams, a 3g and a 4g, and I use the 6v 42ah batteries. I've got 3 months on the 3g camand it's still going strong, and got about 2 months on the 4g cam before I had to change it out. I know the 4g cam uses a lot more power, but I also did not check the battery for a full charge before I installed it on the 4g. I need to start keeping track of the number of pictures taken, but I'm going to say on average, they'll do 50 pics a day each.
BTW, I found a really good price on the 6V42ah batteries...
https://www.1000bulbs.com/product/56308/BAT-UB6420F2.html