Introducing Ocoopa Union 5s, a modular rechargeable hand warmer unlike any others on the market. It’s powered by a replaceable and rechargeable battery core, Union Core, that enables you to refill your hand warmer for another 15 hours of use. Union Core can also be used as a 10,000mAh portable charger even without the heating housing, Union Case. We provide many selectable Union Case, which enables you to match it with your mood and different occasions as you like. And it may not only be a heating case. There will be more possible designs in the future.

Many people have ever used hand warmers. Traditional hand warmers are made with chemicals. One popular kind is disposable hand warmers. When you squeeze the packet, the chemicals mix, and a chemical reaction occurs that generates heat. You can not adjust the temperature. It depends on the intensity of the chemical reaction. When the reaction ends, the hand warmer will no longer be warm, and you have to throw it away. Needless to say, this is wasteful. And if you’re using hand warmers every day, they can get costly over the long run. The cost of about 60 disposable hand warmers can get you an Ocoopa rechargeable hand warmer, which can be reused hundreds or even thousands of times, and enables you to adjust the temperature. It not only helps you to save money but also reduces waste generation.

The design concept of Ocoopa Union 5s fully reflects our adherence to the concept of 3Rs of recycling, Reduce, Reuse and Recycle. At Ocoopa, we stand up for what we believe in by striving to make a positive impact while delivering innovative products and services. Ocoopa joined the Battery Stewardship & Recycling Program of Call2Recycle, which fulfills regulatory obligations and offers an environmentally responsible way to manage batteries at end-of-life in the US and Canada. You can call 1-800-822-8837 or visit www. call2recycle.org to find a proper way to dispose of your end-of-life Ocoopa Union Core. Then, you can purchase a new Union Core and bring your Union 5s to come back to life.

Ocoopa Union 5s are packed with an incredibly large 10000mAh battery cell 21700 which has a 20% increase in energy density, and minimal increases in weight. It can provide up to 15 hours of heat. Accompany you all day long.

It features a detachable and rechargeable battery core, Union core, that enables you to refill your hand warmer for another 15 hours of use anywhere and anytime outdoors. Enjoy uninterrupted warmth and always be ready for any adventure.

It’s the size of a credit card and weighs the same as an iPhone 13 Pro Max. It’s the perfect partner whenever, and wherever you need warmth. If rechargeable hand warmers are just winter necessities in your mind, Ocoopa Union 5s will subvert your mind. It can be used all year round. When winter passes and spring comes, you can take off the heat-generating case and use Union core as a portable power bank. Remarkably compact but powerful. Provides 2.3 charges for iPhone 13 and 1.8 charges for Galaxy S21. It’s the perfect companion for your year-round outings, and it’s definitely worth every penny you spend.

Find a match for your mood or your outfits. Enjoy the warmth tailored to you. Sleek but non-slip finish, unibody & ergonomic design for comfort and firm grip.

Ocoopa Union 5s will deliver comfortable warmth to you in a flash. Moreover, the temperature memory function allows you to enjoy just the right warmth as soon as you turn on the device.

Ocoopa’s new intelligent and precise temperature control technology provides you with 4-level adjustable heat enhancing the hand-warming experience. No more compromise, find the comfortable warmth. 

360° heating surface warms up in seconds. Spread the ideal warmth from your palm to your fingertips. No longer let any part of your hand be forgotten by warmth. It’s a MUST HAVE to spend a cold winter, especially for Raynaud’s arthritis sufferers for heat therapy needs.

Connected through Amass Battery Connector for RC aircraft, you can assemble them effortlessly in 1 second, without worrying about connection stability and security.

The comprehensive safety protection comes with advanced safety features like PC+ Aerospace-grade ABS Plastics and Aluminum alloy Durable housing, MCU+NTC precise temperature control, 21700 Battery Cell (Same as Tesla’s), overload and overheating protection, which is safer and more secure, not only to protect your security, but also the security of your linked devices. Bring you worry-free comfort.

For tech-lover, sports, or outdoor enthusiasts and winter commuters, this rechargeable hand warmer makes the perfect gift for the cold weather season. Bring the warmth from the fingertip to their heart.