i assume you are all referring to 35 mm game cams?? I have a digital and got 5 days out of a set of good energizers; 1 day out of rechargeables, and 1 day out of generic batteries. The manufacturer said that 2 weeks is tops (that is probably in cold weather). wish I could get more (really cant' see why the batteries don't last longer, the camera is only on when taking pictures???)