I am a finish carpenter, and while working, keeping my sigelei 150 in my pocket to keep it warm isn't an option due to the constant sawdust blowing onto me and hanging thickly in the air. You'd be amazed how much of it makes its way into my pockets. It just fills the intake holes and the tip. I have a small duffel bag I keep in the house nearby, but away from dusty areas. I have been keeping my device in there so it stays clean, and just go to it every now and then. Well, it's cold now, and unless I can put my bag where the heater is blowing (rare because that's where the saws will be) it gets cold, juice thickens, inconsistent performance, yada yada. My brilliant (or so I'm thinking) idea is to get a battery powered heated glove to keep my device in while it's in my bag in some cold location. Am I clever or am I not thinking of something problematic?