Hot-Bat Bat warmer (Battery operated) Is the first and only one on the market. Made in the USA of only the highest quality materials. This will last for years! Give yourself every opportunity to be successful. Bat Warmer will keep your bat warm and allow you to swing with confidence on those cold days.Use in the summer to maximize your bats capability. Fits up to any 34 inch baseball or softball bat. Interchangeable battery and heat source. (It will never stop working for you). Powered by 8000 mAh powerbank battery. Bag can only be powered by 8000 mAh powerbank batteries and higher. The item "Bat warmer by Hot-Bat for Baseball and Softball bats" is in sale since Friday, October 26, 2018. This item is in the category "Sporting Goods\Team Sports\Baseball & Softball\Equipment Care & Accessories\Other Accessories". The seller is "hot-bat" and is located in Lake in the Hills, Illinois. This item can be shipped to United States.