HODAF Factory has been manufacturing and developing Electric heating heat pack (hand warmer, insole)for over 15 years. Customisable heat pack specifications: Pattern, Heating duration, Heating temperature.Package. Supply solutions to clients' requirements across various scenarios and applications.
Principle of Electric Heat Pack.
Electric Hand Warmers work by using a rechargeable battery to power an internal heating element , usually made of thin resistance wires or a carbon fiber sheet. When turned on, electricity flows through this element, which converts electrical energy into heat. A small thermostat or control circuit regulates the temperature to prevent overheating. The heat is then evenly distributed through the materials inside, providing portable, lasting warmth for hands.
Electric heated Insoles operate on a similar principle. Flexible heating elements (often carbon fiber or thin metal alloy wires) are embedded inside the insole. Powered by a small, rechargeable battery pack (typically attached to the shoe or placed in a pocket), these elements generate gentle, consistent heat across the sole. An adjustable temperature controller (with multiple heat settings) allows users to customize warmth. This creates a microclimate inside footwear, keeping feet warm and active in cold conditions.
Electric Hand Warm Usage Precautions
Use Official Chargers: Always charge with the provided cable and adapter. Using incompatible chargers may cause overheating or damage.
Supervise Charging: Never charge unattended or overnight. Place the device on a non-flammable, heat-resistant surface while charging.
Check Before Use: Inspect for any damage, leaks, or strange odors. Do not use if the casing is cracked, swollen, or if there is liquid seepage.
Avoid Extreme Temperatures: Do not expose to direct sunlight, open flames, or leave in a hot car. Extreme cold can also reduce battery performance.
Use as Intended: It is designed for external use only. Do not place under blankets, pillows, or directly against bare skin for prolonged periods to prevent burns or overheating.
Keep Dry: The device is not waterproof. Avoid using in rainy or snowy conditions and do not submerge it in water.
Store Properly: When not in use for extended periods, store partially charged (around 50-60%) in a cool, dry place away from children and pets.
Who Should Avoid: Not recommended for infants, young children, individuals with diabetes, circulatory issues, or reduced sensitivity to heat without consulting a doctor.ers - Key Usage Precautions.
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