Depends on time of year and what mode you have them on really, cold weather can drain them and running on video mode can eat them up as well, so if they are close to home I,m happy to check them regular and top up but if they are a distance away I’ll set them on stills and with reasonable battery’s get about 3 months, I also set them in groups so if one goes down the others will get it, it’s all quite hit and miss but I just enjoy being out there and I’d still like to get that 100% photo