It's my first time making this kind of choices, and I really don't know how to go with a choice or another.
I basically know that it should have good durability , a good battery life and good coverage.
What are other practical considerations I should be aware of ? And what about accuracy ?
I actually need to have a pocket GPS to pick points from the electrical network (the nodes are the electrical posts), all to create a cartography of 1/25000 scale. I should cover 500 points or so.