Dual-Mode Power Bank with Cooling Fan and Heated Vest Support

A versatile power bank designed for year-round comfort in demanding conditions. With 30000 or 40000mAh capacity, it delivers reliable power to your devices and accessories whether you're working outdoors, exercising, or managing temperature control. The dual output system covers most needs: a 5V/2A USB port charges smartphones, tablets, and 5V cooling fans, while a dedicated 7.4V DC output powers heated vests and jackets. An included DC adapter cable (3.8mm to 4.0mm) ensures compatibility with most heated apparel on the market. The 7.4V mode heats compatible vests in roughly 3 seconds. If you're using a 5V cooling fan, the USB port runs three airflow settings with low noise for continuous operation. For winter gear users, the DC output provides extended warmth without draining your phone's battery. Recharge the bank itself in about 6 hours via the USB Type-C input. An LED indicator shows remaining capacity—press the button to check battery level, and the unit auto-shuts down after 30 seconds of inactivity. Ideal for construction workers, gardeners, hikers, kitchen staff, warehouse workers, and anyone balancing seasonal temperature needs with the ability to keep devices powered.