This is my first time living in a cold environment (Chicago). My viigen is in a garage (not heated) and is driven all of about 100 miles a month now. Every weekend I try to drive her, and this last weekend I started her up and it took a few slow cranks to get her to fire. Pretty sure this is related to the cold and the battery since it was fine until ave temp is around 30. Is it best to run a battery tender in cold climates, or will this not do a thing?