The ActionHeat 5V battery heated 1/2 zip pullovers are revolutionary in the world of heated clothing. Using the patented 5V signal technology, it allows for most 5V battery to be used with the ActionHeat garments. The ActionHeat heated 1/2 zip pullover shirt comes with a powerful ActionHeat 5V power bank 6000mAh. This power bank powers your garment and can also charge your phone, tablet, or any USB charged device. Note: heating times will diminish if used to charge other devices. ActionHeat battery heated apparel utilizes innovative technology designed to warm the core body temperature. These revolutionary garments feature built-in heating panels and are made with action flex material that provides lightweight warmth, comfort, and versatility. ActionHeat 2XL Heather Blue Polyester/Spandex Blend Heated Jacket | AH-ZTOP-5V-M-B-XXL