KT, I'm not sure we are talking about the same battery device. This is a short version of jumper cables, not something that you leave on your car b/c you wouldn't be able to shut the hood, for one thing, lol.
Hubby saw a similar device in some store ad last night for about $49.
Sears has sale $34.99
Thanks, Chopper! We are going to check with my fav mechanic who is very trustworthy,,THANKS GOODNESS!
Lynn