Milwaukee Large M12 12-Volt Lithium-Ion Cordless Black Heated Hoodie (2 batteries total & charger) Free extra battery $149.99
If you buy online you can add a spare battery to your cart and it will be free at checkout. Thats a 50$ value... so 25% off. I bought one, use it as my jacket to and from work. its like having heated seats to and from the office. Jacket looks good enough that i can wear it in a professional environment (technology). Get a size smaller than you normally would so that the heating elements are closer to you.