Anyone have any experience with heated gear? Firstgear makes a jacket liner that uses a relatively low 65 watts. That should be enough to keep me warm and not be too taxing on the power supply. I want something I can put on and take off the bike - not heating grips that have to be glued on. I have a little 650 sportbike - not a touring bike - so I can only have so many accessories taking power from the bike.