(free shipping in the United States, $30 shipping to Canada and no sales tax outside Colorado) The ETX36C or ETX36D is the only battery we recommend for a snowmobile. We have the only lithium battery that is rated for extreme cold with 405 cold cranking amps. It also takes 10 pounds off your sled instantly so lifting the front end is easier and your speed can be faster since they are 80% lighter than your lead acid battery. And when your season is done, your battery can sit the entire off season and still start your snowmobile in the fall without trickle charging!