【5V2A 20000mAH Battery Pack Special for Heated Clothing】20000mAh large capacity, compatible with most heated devices (men's heated jackets, heated vests and pants) on the market, and also suitable for charging smartphones. Note: This is 5V heating vest battery pack. No DC output, not suitable for 7.4v heated clothing. 【Extra large capacity for all day warmth】With a higher conversion rate, it can continuously heat vests for 6-20 hours (6-7 hours high temperature, 12 hours medium hours, and 20 hours low temperature ). It can charge iPhone 13 4-5 times, iPAD Mini 2-3 times. This is the perfect battery backup for your heated clothing for outdoor use in winter! 【Multiple Safety Protection】We adopt the latest version of intelligent chip and high quality Li-polymer. Its conversion rate is 30% higher than that of its predecessor, and it can protect your devices from overvoltage, overcurrent, overcharging and short circuit to ensure your safety in use. 【Auto Start Function】 It is specially designed for heated clothing. When you wear heated vest, heated jacktet, heated pants or heated hoodies, it is inconvenient to change the battery. With our products, you do not need to press the switch button, because it will be turned on as soon as the battery is connected. It will automatically sleep when not in use. 【Perfect Spare Battery for Heated Clothing】Compatible with most heated devices (heated jackets, vests and pants) on the market, with seamless battery replacement, it can be taken as an extra battery pack, allowing you to enjoy more time outdoors and keep warm at all times. 【Battery Pack Special for Heated Clothing】Whsahans 5V 2A power bank was designed specifically for heated Clothing.(heated vest, heated jacket, heated pants) Note: No DC port, not suit for 7.4v heated clothing. 【Small Size, Large Capacity】With a higher conversion rate, it can continuously heat vests for 3-10 hours (3 hours high temperature, 6 hours medium hours, and 10 hours low temperature ). It can charge iPhone 13 2-3 times, iPAD Mini 1-2 times. It's portable and weighs just as much as a mobile phone. 【Complete Security Certifications】Our products have passed many certifications from different countries, such as UL, FCC, CE, RoSh, and PSE. After years of quality upgrading, now Whsahans power bank can be charged repeatedly for more than 800 times, providing long-lasting support for outdoor heated vests. 【Multiple safety protection 】We adopt the latest version of the intelligent chip and high-quality Li-polymer. Its conversion rate is 30% higher than its predecessor and it can protect your devices against overvoltage, excessive current, overcharging, and short circuit, so as to ensure your safety in use. 【Perfect Spare Battery for Heated Clothing】Compatible with most heated devices (heated jackets, vests, and pants) on the market , with seamless battery replacement, it can be taken as an additional battery pack, which enables you to enjoy more time outdoors and keeps you warm at any time.