That needs to be charged up before you can use it. It should do jump starts once it's charged up.
Thanks. This is the thing that is so confusing to me because I would think the first step in the directions are to charge the battery charger but that is not the case. When it is plugged in, it has little led's that appear to go in circles. I bought it last fall and plugged it in for some hours and it never seemed to charge, just the little circles going around.
My girlfriend's roomate has a AAA if I can't get this thing to work but I paid $60 for it so I am going to give it a try first. It's kind of funny, all the things I seem to need to do today revolve around my girlfried.