My 2002 R1150R has its battery buried under the tank. The ground cable also is not accessible. When the bike stayed outside, I kept the battery charged with a small solar panel. For a year and half the bike has lived in a common indoor garage on the first floor of my building. I parked it near an outlet and connected a trickle charger. Recently a fire department guy demanded the bike be moved to a spot away from outlets. He also forbids running extension cords. I know battery packs are used to jump start vehicles. Can they also be used to maintain our small motorcycle batteries ? If that were the case, how much amperage would have to be on tap. I have zero experience with packs. Any advice appreciated.