OCOOPA HeatCube 2500mAh Rechargeable Hand Warmer｜3-Level Temperature Control × 5-Hour Heating × LED Flashlight｜Compact & Pocket-sized・The Perfect Winter Gift

OCOOPA HeatCube 2500mAh Rechargeable Hand Warmer—a palm-sized cube that combines hand warming, lighting, and a security alarm. Original authentic product with a one-year warranty.
Are your hands freezing in winter, making it painful to use your phone, write, or wait for the bus? The OCOOPA HeatCube rechargeable hand warmer features a built-in 2500mAh lithium battery. With a single press, it provides rapid double-sided heating, warming up in just 3–5 seconds. It offers three temperature settings from 37–50°C and provides up to approximately 5 hours of continuous heat. Weighing only 79g and measuring just 72 × 55 × 25 mm, the device is equipped with a warm yellow LED flashlight and a 105dB±5 alarm buzzer, providing peace of mind when returning home late or camping. The temperature memory function recalls your last setting, so it's warm as soon as you turn it on. Available in four colors, it is a thoughtful gift for yourself or others during winter. ※Perception varies from person to person

2500mAh Battery｜3 Temperature Settings 37–50°C｜Double-sided Rapid Heating｜Up to ~5 Hours of Heat｜Warm Yellow LED Flashlight｜105dB Alarm Buzzer｜Temperature Memory｜Original Authentic Product with One-Year Warranty

Do you encounter these problems?

• Your hands are freezing in winter, but wearing gloves makes it inconvenient to use your phone, write, or operate a camera.
• Disposable hand warmers provide unstable heat and generate waste; you end up using dozens each winter.
• Most rechargeable hand warmers are bulky and heavy, feeling like carrying a brick in your pocket.
• You want a small flashlight to light your way when returning home late or camping, but don't want to carry extra gear.
• You want to give a practical, exquisite, and high-quality winter gift.

Why do hands always get especially cold in winter?

When temperatures drop, the body prioritizes blood supply to the torso and vital organs, leading to reduced circulation in extremities like the fingers. This is why hands are often the first to feel cold, especially when holding a phone or sitting outside for long periods. The OCOOPA HeatCube provides a gentle heat source of 37–50°C directly to your palms using double-sided heating plates, generally making it easier to keep hands warm and comfortable. The three temperature settings can be adjusted according to the weather and personal preference to avoid overheating or insufficient warmth. ※Perception varies from person to person

Three Key Features

1. Three Temperature Settings, Double-sided Rapid Heating

Level 1: 37–42°C for gentle warmth, Level 2: 42–46°C for comfortable heat, Level 3: 46–50°C to fend off chilly winds. Starts heating in about 3–5 seconds after pressing the power button. With heat on both sides, you can feel uniform warmth whether you hold it between your hands or keep it in your pocket. ※Perception varies from person to person

2. 2500mAh Battery, Up to ~5 Hours of Heat

The built-in 2500mAh lithium battery provides up to 5 hours of continuous heating on the low setting, enough for commuting, class, watching a game, or a short excursion. The temperature memory function remembers your last used setting, so no need to reset it next time.

3. Warm Yellow LED Flashlight and 105dB Alarm Buzzer

The side features a built-in warm yellow LED flashlight with soft, non-glaring light—convenient for finding keys at night or lighting your path while camping. The independent alarm buzzer emits a high-decibel sound of 105dB±5, helping to attract attention in emergencies, making it suitable for those walking home alone, the elderly, and students.

Thoughtful Design

• Palm-sized and Ultra-lightweight: 72 × 55 × 25 mm and only 79g—barely noticeable in your pocket, glove, or small bag.
• Temperature Memory Function: Automatically returns to the last temperature setting used, saving you from repetitive button pressing.
• Four Colors Available: Vibrant color options paired with a smooth, cube design—stylish for yourself and impressive as a gift.
• OCOOPA Patented Design: Sleek lines and a smooth surface make it comfortable to hold for long periods.

Product Specifications

Package Contents: HeatCube Hand Warmer ×1, USB Charging Cable ×1, Lanyard ×1, User Manual ×1

Instructions for Use

Tips for Use

• Fully charge before going out. Start with Level 1 to preheat, then increase based on weather for longer battery life.
• Using it inside a pocket or glove reduces heat loss and extends heating duration.
• If not in use for a long period, charge it every 2–3 months to maintain battery health.
• Wipe the surface with a slightly damp soft cloth. Avoid alcohol or corrosive cleaning agents.

Usage Precautions

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

The following individuals should not use, or consult a doctor first:

• Those with reduced temperature sensitivity or poor peripheral circulation.
• Those with wounds, inflammation, or eczema on their hands.
• Infants, young children, and those unable to express discomfort.
• Pregnant women or those undergoing specific medical treatments—consult a doctor before use.

DO NOT

• Use while sleeping or under bedding.
• Use the high setting against the same skin area for long periods.
• Allow children to use it alone or as a toy.
• Disassemble, squeeze, submerge in water, or bring near fire.

During Use

• If you feel overheating, stinging, or discomfort, stop use immediately.
• It is recommended to use the high setting over thin gloves or clothing to avoid direct prolonged contact.
• Do not use the heating function while charging.
• Use a standard 5V charger and keep away from flammable materials while charging.

Who is this for?

• Office workers and students who get cold hands and need to keep warm while using their phones.
• People who want to warm their hands quickly while commuting, waiting in line, watching games, or shooting outdoors.
• Those who need compact, multi-functional gear with lighting for camping, hiking, or night running.
• Individuals walking home alone, the elderly, or students who want an emergency alarm on hand.
• Those who want an eco-friendly, reusable alternative to disposable heat packs.
• Those looking for an exquisite winter gift for cold-sensitive family, friends, or partners.

FAQ

Q1: What's the difference between HeatCube and regular hand warmers?
A: Weighing only 79g and palm-sized, HeatCube combines three-level double-sided rapid heating, a warm LED flashlight, and a 105dB alarm, plus temperature memory. One small device covering warmth, lighting, and safety—perfect for those seeking portability.

Q2: Will it get too hot or burn my hands?
A: Level 1 (37–42°C) is close to body temperature, suitable for prolonged use. Level 3 (46–50°C) is recommended for short-term use over gloves or clothing. If it feels too hot, lower the level or stop using it. ※Perception varies from person to person

Q3: Do I need to replace consumables?
A: No. HeatCube features a built-in 2500mAh rechargeable lithium battery; just use a USB cable to recharge, making it more eco-friendly than disposable warmers.

Q4: Can the flashlight and alarm be used without heating?
A: Yes. The flashlight and alarm are independent functions and can be used without the heating function, serving as a portable light or safety alarm even in summer.

Q5: Is it suitable for small hands, the elderly, or students?
A: Yes. The 72 × 55 × 25 mm cube fits easily in one hand, even for those with small hands, and is operated by a single button. The alarm function provides extra security for the elderly and students. Children should be accompanied by an adult.

Q6: Will my hands definitely get warm after use?
A: HeatCube provides a stable 37–50°C heat source, generally helping to keep hands warm and comfortable. However, actual experience depends on environmental temperature, individual physical condition, and usage. We do not guarantee specific medical results. ※Perception varies from person to person

Q7: Can people with sensitive skin use it?
A: Individuals with sensitive skin can start at Level 1, use it over a thin glove, and monitor skin response. If you have wounds, inflammation, or a history of thermal sensitivity, consult a doctor first.

Q8: How long does the battery last? What about maintenance?
A: Up to ~5 hours on the low setting; duration decreases at higher levels. This is an original product with a one-year warranty. Daily maintenance only requires wiping with a damp cloth; avoid submerging in water.

3-level rapid heat × warm yellow flashlight × security alarm—the OCOOPA HeatCube rechargeable hand warmer, keeping the warmth and peace of mind of the entire winter in the palm of your hand.