1. Product Overview
The Ymiko Portable USB Rechargeable Hand Warmer is designed to provide quick and convenient warmth for various indoor and outdoor activities. Its compact size and ergonomic design make it easy to hold and carry. Featuring a digital display for temperature, it offers two heating modes to suit your comfort needs.
The device is equipped with a 6000mAh lithium-ion battery, ensuring extended use. The exterior arms are made of soft, environmentally friendly material for a comfortable grip. It is an ideal accessory for cold weather, suitable for hiking, skiing, camping, hunting, or simply staying warm at home or in the office.

Figure 1: Ymiko Portable USB Rechargeable Hand Warmer
2. Package Contents
- 1 x Ymiko Electric Hand Warmer
- 1 x USB Charging Cable
3. Setup and Charging
3.1 Initial Charging
Before first use, fully charge your hand warmer. Connect the provided USB charging cable to the hand warmer's input interface and to a compatible USB power source (e.g., adapter, computer, mobile power supply).

Figure 2: USB Charging Port
3.2 Power Supply Modes
The hand warmer can be charged using various USB power sources:
- Adapter: Use a standard USB wall adapter.
- Computer: Connect to a computer's USB port.
- Mobile Power Supply: Use a portable power bank for on-the-go charging.
The 6000mAh lithium-ion battery provides a reliable power source for extended heating.
Video 1: USB Rechargeable Portable Hand Warmer - Charging Demonstration
4. Operating Instructions
4.1 Power On/Off
To turn on the heating function, press and hold the power button located on the top of the device for a few seconds. The digital display will illuminate, showing the current temperature setting.

Figure 3: Power Button Location
4.2 Temperature Adjustment
Once powered on, click the power button to cycle through the available temperature modes. There are two heating levels:
- Low Grade: 45℃ (minimum calorific value)
- High Grade: 60℃ (highest calorific value)
The digital display will show the selected temperature.

Figure 4: Digital Temperature Display
4.3 Fast Heating Feature
The hand warmer is designed for rapid heating, reaching its initial warmth in approximately 3 seconds and full temperature in about 30 seconds, maintaining a continuous cycle between 45-60 degrees Celsius.
5. Safety Features
The Ymiko Hand Warmer incorporates a safety mechanism to prevent accidental operation or overheating:
- Tip-Over Protection: A safety button is located on the bottom of the device. The hand warmer will only operate when this button is pressed, ensuring it is placed upright on a flat surface. If the device tips over, the button releases, and the heating function automatically shuts off.
- Overheat Protection: The device is designed to automatically regulate its temperature and shut off if it detects overheating, enhancing user safety.
6. Maintenance
6.1 Cleaning
To clean the hand warmer, wipe the exterior with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
6.2 Storage
When not in use, store the hand warmer in a cool, dry place away from direct sunlight and extreme temperatures. Ensure the device is fully charged before long-term storage to maintain battery health.
7. Troubleshooting
- Device not turning on: Ensure the hand warmer is adequately charged. Check that the safety button on the bottom is fully pressed by placing the device upright on a flat, stable surface.
- No heat output: Verify the device is powered on and the desired temperature mode is selected. Confirm the safety button on the bottom is engaged.
- Intermittent heating: This may indicate low battery. Recharge the device. Also, ensure the device remains stable and upright to keep the safety button engaged.
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | Ymikoqk1rwhe6ut-12 |
| Material | ABS, Aluminum alloy |
| Battery Type | Lithium-Ion (built-in) |
| Battery Capacity | 6000mAh |
| Height | Approx. 99mm / 3.9in |
| Width | Approx. 40mm / 1.6in |
| Extend Arms Size | Approx. 65mm / 2.6in |
| Max Distance Between Arms | Approx. 79mm / 3.1in |
| Lower Temperature Rating | 45 Degrees Celsius |
| Upper Temperature Rating | 60 Degrees Celsius |
| Reusability | Rechargeable |
| Power Source | Corded Electric (for charging) |

Figure 5: Product Dimensions

Figure 6: Internal Components Diagram
9. Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact Ymiko customer service directly. Keep your purchase receipt for any warranty claims.