Designed for Heated Vest: This 7.4V 16000mAh battery is designed for heated clothing, offering both DC and USB output ports for versatility, perfectly compatible with ORORO and Venustas and most heated clothing brands. it also compatible with mobile devices, it can charge your iPhone 15 up to 4 times, no more battery anxiety Long-Lasting Warmth: The battery boasts a 16000mAh large capacity, providing long-lasting power for your heated clothing. It can deliver 8~10 hours of warmth on low heat temperature, 6-8 hours on medium, and 4-6 hours on high, depending on the power of your heated clothing and the temperature settings you choose. One charge provides a full day of comfort, you can focus on your activities without worrying about the cold Smart Auto-Sleep and Wake-Up: The battery automatically powers on when connected to your heated clothing, just press the switch on your heated clothing to start heating. When the heated clothing is not in use, the battery enters sleep mode, savin