Please don't laugh. I got my RC last summer and up till this point, it has been running like a champ. I went to start it today and it wouldn't turn over. Being that it was like 20 degrees last week and it hadn't turned right over the last two times I went t start it, I figured it needed a charge. I have a battery tender that I used on my previous bikes and I went to hook it up. I took the seat off and I'll be damned if the previous owner didn't put a ZIPPY battery on her! For those who are unaware, a Zippy battery is used on Radio Controlled cars and helicopters. I was wondering why the bike was so light at 440lbs. I'm assuming that this Zippy battery thing is reversible.