If this is an optional item, it's really incumbent on the importer/seller to select appropriate options. I live in Australia where most (all?) vehicles are imported, and the local importer selections the range of options and ALSO does specific tuning/modifications for the local environment/market (e.g. suspension tuning for bad roads and engine tunes for higher air intake temperatures). If the importer/reseller doesn't option correctly, of course it's not going to be so great. In Australia only very few locales need a battery heater.