I'm not a fan of the 12v lead battery to use with the starter. Not only is it an extra 10 pounds or so you have to lug back and forth, but it also requires your starter to be attached to a cord which becomes something else you have to manage. Much better IMO is a NiCd or lipo battery pack attached directly to the starter. It's considerably lighter and more compact, and there is no cord to bother with.