The Warming Store: Using the patented 5V signal technology, it allows for most 5V battery to be used with the ActionHeat garments. The ActionHeat heated 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 The Warming Store has become one of the largest online retailers of heated clothing, winter apparel, electronic heating products for people and pets