I can't respond with facts about any other models but I have 3 units. A Magellan Map 340, a Garmin etrex Legeon Cx and a Garmin Map 60 CSx. The old Magellan works as good as the etrek Legeon CX but eats batteries for breakfast, lunch and Dinner. The Etrek Legeon Cx runs forever on 2 Nimh batteries (32 hours) but looses the signal in tree cover. The 60CSx really holds the signal well even indoors and battery life isn't too bad . (about 18 hrs) more if I turn the compass off. So. Now the 60 CSx is the only one I use. I let guest use the etrek Legeon Cx and the old Magellan.