My oregon eats batteries....only complaint I have. I never leave mine on for any longer than I have to. It boots up fast, finds antena fast and is a pretty amazing unit, except for the batter life. At first I was really bothered by the fact it eats batteries fast....but then I re-evaluated my use of it and I never have to leave it on for long periods of time. I never make trails and primarily use it for topography, and waypoints. I usually will get 2-3 days worth of battery life out of mine using it like I do.