Interesting, none of mine took AAA. I bought my first Etrex in 2001. It did not have mapping capability, used AA. I bought it for kayaking on Lake Superior, if you are paddling towards an island, if the fog comes in you really could have a bad day if you accidently paddled past the island you were padding to. I manually entered the lat and long for the island campsites in the Apostile Islands so that I could use the GPS to paddle to them if it got foggy. That Etrex could save a track and display an on screen map with the track, but the only thing on that map was your track and any waypoints you entered.



But Etrex can mean anything from that first one I bought that could not do mapping to current day models.

Later I used a Legend and Vista, essentially an Etrex but they had mapping with minimal memory, black and white screens. I used these on my bikes until 2016 was the last year that I used them.