John I always charged mine either in my warm basement or in a warm motel room and that’s after riding in my warm pick-up. My electronics never go in the back bed. I guess I just got a bad battery. It’s funny that shuttle hasn’t been used since last January and has been in the basement and I just turned it on and it’s at 97% but as soon as you put it on the ice it gets wimpy.:???:
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My shuttle got replaced last year for that same issue. Now the replacement is acting the same. After about four on the ice down to about 50% warms up in the truck on the way home back up to 85-90%.