the first one i bought was a cheap Vector brand one, total trash, fan killed on me and it overheated thus killing itself. sense then i bought a diehard one and its pretty good. for starting i use a optima battery on a dolly and some jumper cables. for that i have a Battery Tender that keeps it charged. for autos you dont drive all the time a Battery Tender is the way to go. hook it up and forget about it. it wont start a dead battery but it keeps them charged