NOTICEIt doesn't work with 7.4V or 12V DC input heated vest.Experience unrivaled warmth and convenience with our battery for heated Vest. Designed specifically for heated vest power bank, this small and lightweight Power bank for heated vest ensures you stay cozy during winter.This mini battery also can use for phone charges like a portable power bank.It can do PD20W and QC22.W fast charging. Various charging portsOur heated vest battery pack features USB A and USB C port,usb c port, making it compatible with various devices. The 5V 2A/3A Power bank ensures efficient charging, perfect for extended use in cold weather.Meanwhile this usb c port and usb A port also can function like a portable charger power bank to charge phone. Fast charging portable charger for phoneStay active and warm with our Heated Jacket battery pack. This fast charging power bank also can used for phones.It support PD20W and QC22.5W fast charging.So can use for smart phones too. Mini size but big