What I do is set the tracking to like 2 hours. So it doesn't use all that much battery. When I get up at a camp site, I power it up, get the food bag, water a tree....normal stuff. When I am doing final pack up I send the auto message "starting here", clip it to the pack and take off. When I stop to camp, I set it on a rock and send the preset text of "stopping here". If wife wants to reply, she will. I check it and power it back down around an hour later or when I turn in. The battery last a week or more doing that. I carry a battery back up so can recharge out in the woods. It I use my smart phone to run a GPS, THAT eats up most of the power and needs recharged everyday.