Forgive my ignorance.....I just received my infinity yesterday. First of all I thought the kit came with an atty, but I was mistaken. So I'm going to look around in my inventory and try out a standard resistance carto first. Thank goodness I was smart enough to order a couple of adapters. I think I must have ordered a blemished one, too. Anyway, do I need to charge the batteries before they will work....and about how many times will I be able to re charge them? Also, I don't really see any numbers on the dial...so I guess I'll just play around with it for awhile when I get started. I think I also need to go to harborview freight tool place and get a little screwdriver to take the tip off. I'm positive that's where the batteries go. Wow...I am feeling pretty stupid right about now.