20000mAh Fast Charge Battery PackCompatible with most USB 5V/7.4V DC heated garments, delivering up to 12 hours of warmth. After turning off the heated vest, simply flip the switch to restart heating without unplugging the battery for a smoother experience. Supports up to 18W fast charging, capable of charging an iPhone 15 or Galaxy S23 up to 3.5 times. For optimal fast charging, use a 5V/3A, 9V/2A, or higher-wattage adapter. Fully charges in just 6 hourssaving time and keeping you cozy. Universal Compatibility - The HIMONI 7.4V heating vest battery pack is specifically designed for heating vests. It is compatible with ORORO and Venustas heated apparel, as well as all USB 5V heating vests on the market and most 7.4V DC heated garments equipped with 4.0mm/3.8mm/3.5mm ports. The USB and Type-C ports can also charge mobile devices like smartphones. Note: No DC 12V output. Lightweight Portable Design The HIMONI 20000mAh battery pack is engineered for heated vests, offering 87%