Ocoopa UT5 Nano Ultra-Mini Fast-Heating Hand Warmer | 52g, smaller than a heat pack × 2-second instant heat × 3-level temperature control 38–52℃ | Up to 7.3 hours battery life・2000mAh・International UL certified

Ocoopa UT5 Nano Ultra-Mini Fast-Heating Hand Warmers—smaller than a heat pack, lighter than a lipstick, weighing only 52g each with dimensions of 48×56×14mm. Heats up in 2 seconds; a pair allows you to warm both hands simultaneously. Genuine product with a one-year warranty.
Do you find hand warmers to be too bulky and heavy, so you end up leaving them behind? Ocoopa introduces the brand-new UT5 Nano, an ultra-mini hand warmer measuring just 48×56×14mm. Smaller than a disposable heat pack and lighter than a lipstick, it fits easily into pant pockets, jeans coin pockets, gloves, or even a wallet, making it effortless to carry everywhere. Features 2-second rapid heating so you don't have to wait, providing instant warmth. With 3 temperature settings (38–42℃ / 43–47℃ / 48–52℃), it is perfect for Hong Kong's unpredictable weather, where mornings are cool and afternoons are warm. The built-in 2000mAh battery provides up to 7.3 hours of extended battery life, keeping you warm for an entire shift. The aluminum alloy body features a collaborative embossed floral print, making it exquisite and refined. It has passed international UL safety certification, ensuring peace of mind. ※Experience may vary by individual

52g ultra-mini | 48×56×14mm | 2-second instant heat | 3 temperature settings 38–52℃ | 2000mAh | up to 7.3 hours battery life | sold as a pair | USB-C charging | aluminum alloy body | international UL certification | genuine product with one-year warranty

Do you encounter these problems?

• Hand warmers that are too big and heavy make your pockets bulge, turning them into a burden when you go out.
• Having to wait minutes for it to heat up, just when you need it the most in the cold.
• Disposable heat packs are wasteful and bad for the environment when replaced daily.
• Hong Kong's weather fluctuates; hand warmers with only one temperature are either too hot or not warm enough.
• A single hand warmer only warms one hand; alternating hands is inconvenient.

Why do our hands always feel cold first?

• When temperatures drop, the body prioritizes blood supply to the trunk and vital organs, reducing circulation to extremities like the fingers. This is why hands are often the first to freeze, especially during long waits for transport outdoors, while holding a phone, or working in air-conditioned offices. The Ocoopa UT5 Nano uses 2-second instant heating combined with 3 precise temperature controls to help your hands recover warmth quickly and stay comfortable in low-temperature environments. Its ultra-mini size ensures you’ll actually want to put it in your pocket and carry it out every day. ※Experience may vary by individual

Three Highlight Features

1. Ultra-mini design, smaller than a heat pack

Each unit weighs only 52g and measures 48×56×14mm with a thickness of just 1.4cm. It is smaller than a heat pack and lighter than a lipstick. It fits into pockets, gloves, small handbags, or even wallets without taking up space or creating bulges. This is the most compact model in the Ocoopa series.

2. 2-second instant heat, warm the moment you turn it on

The all-new rapid heating mechanism starts warming in about 2 seconds, eliminating the need to wait in the cold. Whether you’re stepping off a bus or leaving a shopping mall, press the button and enjoy instant warmth. ※Experience may vary by individual

3. 3 temperature settings, perfect for Hong Kong's unpredictable weather

Low mode (38–42℃) is gentle and suitable for long-term holding; medium mode (43–47℃) handles daily chilly winds; high mode (48–52℃) tackles cold snaps. Red/blue indicator lights show the setting, switchable with one click to adjust to large morning-to-night temperature gaps.

Thoughtful Design

• Up to 7.3 hours of battery life: Built-in 2000mAh battery provides up to 7.3 hours of continuous heat on the low setting; general use lasts about 3–6 hours, sufficient for a full day of commuting, working, and shopping.
• A pair of two: Hold one in each hand for simultaneous warming, or keep one for yourself and give one to your partner or child—share the warmth anytime.
• USB-C charging: Uses a universal Type-C interface (5V/1A), compatible with your phone's charging cable. Fully charges in about 3.5 hours.
• Aluminum alloy body × Embossed floral print: Ocoopa × Artists in Bloom collaboration design. The matte texture and embossed pattern are durable and scratch-resistant—stylish, refined, and perfect for gifting.
• International UL safety certification: Built-in smart temperature control and overheat protection ensure stable heating and safe usage.
• Reusable: Replaces disposable heat packs, making it more eco-friendly and cost-effective.

Product Specifications

Package Contents: UT5 Nano Hand Warmer ×2, USB-C charging cable ×1, User Manual ×1, Gift Box

How to Use

Usage Tips

• Charge before going out, pre-heat on low, and adjust to higher modes based on the weather to extend battery life.
• Using them inside a coat pocket or gloves reduces heat loss and extends heating time.
• If the high mode feels too hot, hold it over thin gloves or fabric for a gentler experience.
• Use low mode for long periods in air-conditioned offices and switch to higher modes outdoors in the cold.
• If stored for a long time, charge every 2–3 months to maintain battery health.
• Wipe the body with a slightly damp, soft cloth. Avoid alcohol or corrosive cleaners; this product is not waterproof.

Precautions

This product is a household rechargeable hand warmer and is not a medical device.

The following individuals should avoid use or consult a doctor first

• Individuals with impaired temperature sensitivity or poor circulation.
• Those with wounds, inflammation, or eczema on their hands.
• Infants, young children, or those unable to express discomfort.
• Pregnant women or those undergoing specific medical treatments should consult a doctor.

DO NOT

• Use while sleeping or under blankets.
• Use high mode against the same area of skin for long periods.
• Allow children to use it unattended or as a toy.
• Disassemble, squeeze, submerge in water, or place near open flames.

While in use

• If you feel it is too hot, tingling, or uncomfortable, stop use immediately.
• Do not use the heating function while charging.
• Use a compliant 5V/1A USB charger and keep away from flammable materials while charging.
• Follow airline regulations for lithium-ion battery products when flying.

Who is this for?

• Urbanites who find regular hand warmers too big and heavy and want a truly pocket-sized option.
• Users with smaller hands who want a comfortable grip that fits into gloves or wallets.
• Those who commute, wait for transport, or walk around daily and want instant warmth when their hands get cold.
• Students and office workers who need flexible temperature control for Hong Kong's varying temperatures and indoor/outdoor shifts.
• Anyone wanting to warm both hands at once or share a pair with a partner or family member.
• Those looking for an exquisite, small winter gift for family, partners, or colleagues who fear the cold.

FAQs

Q1: How small is the UT5 Nano exactly?
A: Each unit is about 48×56×14mm and 52g, smaller than a heat pack and lighter than a lipstick. It is barely noticeable in pockets, gloves, or wallets, making it the most compact model in the Ocoopa series.

Q2: Is "2-second instant heat" real?
A: The UT5 Nano uses a rapid heating mechanism that begins warming about 2 seconds after being turned on, reaching noticeable warmth within seconds—much faster than traditional warmers. Real-world experience varies by ambient temperature and settings. ※Experience may vary by individual

Q3: Is the 7.3-hour battery life per unit or for the pair?
A: Calculated per unit. Each has a 2000mAh battery that provides up to 7.3 hours of continuous heat on low. Standard daily usage is about 3–6 hours; higher settings drain the battery faster. Using them as a pair means both hands get long-lasting warmth.

Q4: What are the three temperature settings? Will they burn my hands?
A: Low 38–42℃, medium 43–47℃, high 48–52℃. Low is gentle for long-term holding; high is for short-term use in cold winds. If it feels too hot, hold it over gloves or switch to a lower setting. Built-in smart UL-certified temperature control protects against overheating. ※Experience may vary by individual

Q5: Will my hands definitely stay warm?
A: The UT5 Nano provides stable, three-level heat sources, generally helping keep hands comfortable in cold environments. However, actual results depend on ambient temperature, wind, personal constitution, and usage style. We do not guarantee specific medical results. ※Experience may vary by individual

Q6: What's the difference between this and the UT5 Sway or UT5 Douheat? Which one should I choose?
A: The UT5 Nano focuses on ultimate mini-size and precise 3-level temp control; the UT5 Sway has a sleek, ergonomic design with a silicone lanyard for better aesthetics and grip; the UT5 Douheat features dual-sided heating and magnetic splitting, with a 67g weight per unit and up to 8 hours of battery, best for those wanting maximum heat.

Q7: Can I take it on a plane?
A: The UT5 Nano contains a small 2000mAh lithium battery and can generally be carried on board; do not place in checked luggage. Always follow the specific airline's latest regulations.

Q8: Can one cable charge both at the same time?
A: A USB-C charging cable is included. Some batches feature a 1-to-2 design for simultaneous charging (subject to actual arrival); otherwise, you can charge them separately using any compliant 5V/1A Type-C cable.

Smaller than a heat pack × 2-second instant heat × 3 temperature settings—Ocoopa UT5 Nano Ultra-Mini Fast-Heating Hand Warmers: small enough to fit in a wallet, warm enough to last a full shift.