It weighs about 5 pounds. I imagine you could pack a battery or two.
I think the bigger issue is “long haul” hiking. I don’t think there are chargers on the Appalachian Trail.
No, but I used to take ONE two-hole plug plate on my AT hikes and and screw them into them shelters... People walk up and laugh because there are no actual plugs, just the wall plates:) It is a great little conservation piece.