I also use a Dark Energy Poseidon and it works pretty good. I don't get as many charges out of it as I hoped, but that is the same with any other manufacturer I have tried. It's just about bomb proof and made by hunters so I will support them over the next guy. I have yet to go on airplane for charging so I might gain a bit there. Tried solar stuff in the past and was unimpressed. Might be more useful in the Southern states than the Northern Rockies.