Looking for a really good handheld GPS

[Ravensview]

Batteries if using AA’s we get a few days use from them (I wanna say 3-4 of constant use with most detailed topos), but we set a lot of waypoints and tracks as well running them 8-10 hours a day, we usually use rechargeable batteries and have a charger in the truck plugged into the 12 volt socket, always have four on the charger and 2 in the unit with 2 spares and a compass backup, the chargers will also work on an atv.

Ok..lots of good advice..How about battery use in the field?

That being said we replace the batteries in the unit before they get to low, so I have never run any of ours out to the minimum voltage for power, the more features you use the quicker they go, like backlighting, refresh rate, screen time on etc…, and I still carry a map and at least one compass