I had an 06 rancher and it had the manual pull starter on it.My 2013 does not.I was going to buy one for $150 and then figured out if my battery dies it will not start with a manual pull start anyway. So I was looking at a back up battery pack to jump the wheeler if need be. I am looking at a 300 amp battery pack.Can I go bigger 400 amp or more or how high would / can you go ?