Begin new to LiPo's I'd like some guidance on safe storage. I've researched and understand they can be dangerous if not properly charged and handled. Otherwise they're fine. I also understand the storage voltage to be 3.8 per cell. My question is, is it OK to store 3 of them in a LIPO bag in a steel ammo can in the closet? The can does NOT have vent holes. Yet??? I'm in snow county and I think it may not be good to store them in a cold garage. Thanks gang!