If I had the motorcycle battery handy, I'd certainly use it. ?Check water levels occasionally if it has vent caps, especially if it's on the charger much. ?I even suggested somebody try a motorcycle battery here a few weeks ago when I thought they might be having trouble with their switching power supply. ?But they aren't built to give a lot of discharge cycles, and lithium is far better than lead if you are going to be lugging it around in a backpack. ?
