nstant double-sided heating with a single click in just 3 seconds. Crafted from aerospace-grade aluminum and ABS materials, it’s rugged, portable, and slip-resistant for effortless handling.

• Safety First: Our battery boasts a dual-temperature control system for utmost safety. The aerospace aluminum surface ensures excellent heat conductivity and dissipation. Optimized circuitry guarantees a longer lifespan.
• Extra Power: The 5200mAh battery doubles as a portable power bank with a USB C converter, compatible with both iPhone and Android devices, making it an ideal travel companion.

nstant double-sided heating with a single click in just 3 seconds. Crafted from aerospace-grade aluminum and ABS materials, it’s rugged, portable, and slip-resistant for effortless handling.

• Safety First: Our battery boasts a dual-temperature control system for utmost safety. The aerospace aluminum surface ensures excellent heat conductivity and dissipation. Optimized circuitry guarantees a longer lifespan.
• Extra Power: The 5200mAh battery doubles as a portable power bank with a USB C converter, compatible with both iPhone and Android devices, making it an ideal travel companion.

nstant double-sided heating with a single click in just 3 seconds. Crafted from aerospace-grade aluminum and ABS materials, it’s rugged, portable, and slip-resistant for effortless handling.

• Safety First: Our battery boasts a dual-temperature control system for utmost safety. The aerospace aluminum surface ensures excellent heat conductivity and dissipation. Optimized circuitry guarantees a longer lifespan.
• Extra Power: The 5200mAh battery doubles as a portable power bank with a USB C converter, compatible with both iPhone and Android devices, making it an ideal travel companion.

4 Levels of heating.

• Detachable Battery & Heating case: The world’s first modular rechargeable hand warmers, the Ocoopa Union 5s, is composed of a Union core- 10000mAh battery bank and a Union case- heating housing. It enables you to replace the battery or heat casing as needed. In only three steps, you can alternate with a fully charged battery. Refill your hand warmer in seconds for another 15 hours of warmth. Swap and go.
• Heat that lasts for 15+ hours: Ocoopa Union 5s is equipped with a 21700 battery cell with a capacity of 10000mAh, leading in a 20% improvement in energy density and only a slight increase in weight. It can deliver heat for up to 15 hours. Accompany you throughout the day.
• Faster Heat. Larger surface: Feel a comfortable warmth like you’ve never felt before. The U5s features a uni-body high grade brushed aluminum casing with a 30% bigger heat surface than previous. Spread the ideal warmth from your palm to your fingertips. You can always have your comfortable heat with four temperature ranges ranging from 145°F to pick from.
• Your must-have gadget for every season: U5s hand heater comes in 4 temperature levels, allowing you to choose the most suitable temperature in winter. During the summer, remove the Union case and use the Union core as a 10000 mAh USB-C portable charger. U5s is both a hand warmer and a portable power source!
• Ideal Winter Tech Gift: Patented original design, stylish look, and practical function make U5s ideal gifts for tech lovers, sports or outdoor fanatics, and anyone you love. Bring the warmth from their fingertip to their heart.

10,000 mAH- fully charged this hand warmer can last up to 10 hours.

This model can be used as a hand warmer and also can charge up other devices.

They are designed to keep your hand warm in very cold conditions. Due to their low weight they can be used when Snow Skiing, walking, climbing, Golf and many other activities.