SPECIALLY DESIGNED BATTERY FOR HEATED VEST: 7.4V 3A power bank is specially designed for heated vests, heated jackets, heated pants and other heated device. The heated vest battery has two output ports, 7.4V DC and USB, and is compatible with most 7.4v heated clothing on the market.Professionally customized batteries provide continuous and stable output for heated clothes, which is safe and reliable(Note: Compatible with ORORO and Venustas heated clothing, No suit for 5V Heated Device) SMALL SIZE, LARGE CAPACITY: The large-capacity heated vest battery of 20000mAh can continuously provide current for the heated vest for 7-14hours (high temperature for 7 hours, medium temperature for 11 hours, and low temperature for 14 hours). The battery pack for heated vest can charge iPhone 14 Pro 2 times, iPad Pro 1-2 times, and Airpods Pro 14 times. Battery pack for heated jacket can be taken on a plane and is perfect for traveling 2 DC ADAPTERS: The DC interface model of the battery is: 4.0 m