Quick, reliable warmth: Heats on both sides in seconds for even heat distribution and maintains comfortable warmth for 3–8 hours, giving fast relief from cold without waiting. Two functions in one device: Builtin 10000 mAh battery acts as a hand warmer and a power bank to charge smartphones and other USBpowered devices, so you stay warm and connected on the go. Designed for everyday use: Nonslip, comfortable grip with an ergonomic shape makes it easy to hold for long periods. Compact and lightweight for pocket or backpack carry. Durable materials: Constructed from sturdy aluminum with silicone accents for a pleasant touch, long service life, and reliable performance in outdoor conditions. Safe, consistent performance: Even heat distribution and solid build quality provide continuous warmth during daily use and outdoor activities. Compatibility and performance: 10000 mAh capacity supplies backup power for phones, tablets, and other USB devices. The hand warmer's dualsided heating ensures balanced warmth for both hands. Use scenarios Hiking and camping: Keep hands warm during breaks and use the battery to recharge a phone, GPS or headlamp when you're off the grid. Winter sports and outdoor events: Slide it into gloves or pockets during skiing, fishing or outdoor concerts to stay comfortable for hours. Commuting and everyday cold weather: Warm your hands on cold walks, at bus stops, or while waiting outdoors and up your phone battery as needed. What makes it stand out Immediate heat plus long runtime (3–8 hours) for dependable comfort. Twoinone design eliminates the need to carry a separate power bank. quality aluminum and silicone construction for durability and a comfortable grip. Compact form factor and nonslip surface for easy, secure carrying and handling. Key specs at a glance Battery capacity: 10000 mAh Heating: Dualsided for even heat distribution Run time: Approximately 3–8 hours depending on settings and use Materials: Aluminum housing with silicone accents Functions: Rechargeable hand warmer and external battery (power bank) What you get A compact, rechargeable hand warmer that delivers fast, even heat and doubles as a 10000 mAh external battery—built to be durable, easy to carry, and practical for outdoor activities, commuting, and everyday coldweather use.