Come on guys, Batteries failing?? Duh. Carry some spare ones,, I carry and use a map and compass for a back-up for my GPS. I have a map and compass on my GPS screen which works well under heavy Oregon cover. The altimeter works great also. Man quit using the sun dial when the clock was invented, now I use an atomic watch that keeps time to the nano second accuracy and the battery hasn't been changed out in 5 yrs. I like knowing EXACTLY where I am in the dark. Not traditional?? oh well.