I'm looking for a simple GPS unit, something that could supplement my phone with its poor battery life. I don't need anything fancy in terms of recording health data and performance, which I don't care about, but I want good maps, with trails and contour lines, for bikepacking trips. I don't have experience with those tools, but I've seen some that had terrible maps. Ideally I would like to be able to upload a RWGPS route and map. Can anyone recommend something I could possibly find used, so not the newest model?