The included flat battery is not Milwaukee branded but works great and lasts all day.

The Milwaukee M12 12V Men's Heated Axis Hooded Jacket in size 3X is a high-quality and durable winter garment designed for outdoor work or recreational activities. Made with polyester outer shell material, this jacket provides excellent warmth and protection against the cold. It is powered by a 12V battery, ensuring reliable heat for extended periods of time. The black color, sleek design, and hooded style make it both functional and stylish for men looking to stay comfortable in chilly conditions.