I really don't have much to add about the specific GPS unit that will work for you, but I am becoming a fan of rechargeable power supplies. For my next GPS unit, I will prefer a rechargeable.

Right now, I will go out with a phone and any of various lights, the best of which can be replenished from a power bank which is also a backup flashlight or lantern. For extended trips away from vehicles or other sources of electricity, I can add a solar panel and keep myself juiced up indefinitely.

There is at least one headlamp which can accept AA or lithium-ion 14500 batteries. There is at least one 14500 battery with a recharging port built in, so it can refreshed from a power bank.

So many choices....Much depends on the duration of an excursion. The setup that is fine for a two day trip might not be best for a week or more...