His links are much like what I was talking about, separate the panel from the charger so you can get a good charger and have a more modular and flexible system. I'm still learning navigation so the gps is a good way to double check my compass/map work. I also need to get more paper maps and have found that there us some special paper that I can buy and print on and its water proof and foldable so I can print the maps that I have on my gps, thats my long term goal. I'm gathering some of my own data waypoints that I want to be able to print and have on the gps.

I happened to mention GPS due to it being a recent purchase, I also have lights, radios, etc that use the same batteries.