Cousin brought a portable battery on our hunting trip to try out. It was about half the size of the one linked and kept or phones charged all week without having to recharge the cube at all. I think it still showed 60-80% battery by the end of the week; can't remember. Anyway, something that size could easily be at least 50aH and mammy of those can be charged with 120AC, 12V DC, or solar.


If your handset, you can build one line I had on my van with a 50w panel and 20A solar charger, all the wiring and ports, and I had an 18aH battery for only about $100.