Does anyone make a heavier duty battery for the prairie 650? Something with more CCA(cold cranking amps). Was out ice fishing in below zero weather today and battery was not dead, but it would not turn motor over fast enough to start it. I had to pull start the darn thing, with the reliability of the kawasaki pull starter I don't want to have to rely ont that to often. Would have been a long 2.5 mile walk off the ice! Any help would be appreciated, thanks