1. Introduction
The U UZOPI Electric Hand Warmer (Model YZE-B23) is a portable, rechargeable device designed to provide warmth in cold conditions. It features dual-sided heating, four adjustable temperature levels, an integrated LED display, and can also function as a power bank. Its compact design makes it suitable for various outdoor activities and daily use.
Image 1.1: U UZOPI Electric Hand Warmer and packaging.
Key Features:
- Dual-Sided or Single-Sided Heating: Offers flexible heating options to conserve battery or maximize warmth.
- 4 Temperature Levels: Customizable heat settings ranging from 100.4℉ to 127.4℉.
- Long-Lasting Warmth: Up to 15 hours of warmth on a single charge (single-sided heating).
- LED Display: Shows remaining battery percentage and current temperature setting.
- Built-in LED Light: Provides illumination for convenience in low-light conditions.
- Power Bank Function: Can charge other USB-C compatible devices.
- Compact and Portable: Ergonomic design, lightweight, and easy to carry.
2. Package Contents
Please check the package to ensure all items are present:
- 1 x U UZOPI Electric Hand Warmer (4000mAh)
- 1 x USB-C Charging Cable
- 1 x Black Lanyard
- 1 x User Manual
3. Setup and Charging
Initial Charge:
Before first use, fully charge the hand warmer. Connect the provided USB-C charging cable to the hand warmer's Type-C input port and plug the other end into a compatible USB power adapter (not included). The LED display will show the charging progress. A full charge typically takes approximately 3 hours.
Connecting the Lanyard:
Attach the black lanyard to the designated loop on the hand warmer for secure carrying and to prevent accidental drops.
4. Operating Instructions
Power On/Off:
- To power on the heating function, press and hold the power button for 3 seconds. The LED display will illuminate, showing the current battery level and heating mode.
- To power off the heating function, press and hold the power button for 3 seconds again.
Adjusting Heat Levels and Modes:
The hand warmer offers 4 temperature levels and can operate in single-sided or dual-sided heating modes.
Image 4.1: Four heat settings and their temperature ranges.
- After powering on, short press the power button to cycle through the heating levels (L1, L2, L3, L4 for single-sided heating, or H1, H2, H3, H4 for dual-sided heating).
- Single-Sided Heating (L1-L4): Provides warmth from one side, extending battery life.
- Dual-Sided Heating (H1-H4): Provides warmth from both sides for maximum heat output.
- The LED display will indicate the selected heating level (e.g., L1, H3).
Image 4.2: Battery life comparison for single-sided and dual-sided heating modes.
LED Display Functionality:
The clear LED display provides real-time information:
Image 4.3: Digital LED Display showing battery and heat settings.
- Battery Percentage: Displays the remaining battery charge (1%-100%).
- Heating Level: Indicates the active heating mode (L1-L4 for single-sided, H1-H4 for dual-sided).
Using the Built-in LED Light:
The hand warmer includes a small LED light for convenience.
- To turn on the LED light, double-press the power button.
- To turn off the LED light, double-press the power button again.
Image 4.4: Using the built-in LED light.
Power Bank Function:
The hand warmer can serve as a portable power bank to charge other devices.
- Connect your device's charging cable to the hand warmer's output port (Type-C).
- The hand warmer will automatically begin charging your device.
- Note: Using the power bank function will deplete the hand warmer's battery, reducing its heating duration.
5. Maintenance and Care
- Cleaning: Wipe the surface of the hand warmer with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
- Storage: When not in use for extended periods, store the hand warmer in a cool, dry place. It is recommended to charge the device to about 50% before storing to prolong battery life.
- Battery Care: Avoid fully discharging the battery frequently. Recharge the device when the battery level is low to maintain optimal battery health.
- Avoid Extreme Temperatures: Do not expose the hand warmer to direct sunlight, high temperatures, or extremely cold environments for prolonged periods.
6. Troubleshooting
- Device not turning on: Ensure the device is charged. Connect it to a power source and allow it to charge for at least 15 minutes before attempting to power on again.
- No heat output: Check if the heating function is activated (LED display shows H/L level). If the battery is low, recharge the device.
- Not charging: Verify that the charging cable is securely connected to both the hand warmer and the power adapter. Try a different USB-C cable or power adapter.
- LED light not working: Double-press the power button to activate the LED light. If it still doesn't work, ensure the device has sufficient battery.
- Device feels too hot/cold: Adjust the heating level using the power button. If the device becomes excessively hot, power it off immediately.
7. Specifications
| Parameter | Value |
|---|---|
| Product Name | Hand Warmer |
| Model Name | YZE-B23 |
| Brand | U UZOPI |
| Battery Capacity | 4000 mAh |
| Input | 5V/2A (Type-C) |
| Output | 5V/2A |
| Charging Time | Approx. 3 hours |
| Working Time (Single-Sided) | 7.5 - 15 hours (depending on heat level) |
| Working Time (Dual-Sided) | 4 - 9 hours (depending on heat level) |
| Temperature Levels | L1/H1: 100.4-105.8℉ L2/H2: 107.6-113℉ L3/H3: 114.8-120.2℉ L4/H4: 122-127.4℉ |
| Dimensions (LxWxH) | 1.97 x 1.06 x 4.06 inches |
| Weight | Approx. 0.3 lb (3.7 oz) |
| Material | Aerospace-grade aluminum |
8. Warranty Information
The U UZOPI Electric Hand Warmer (Model YZE-B23) comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or improper maintenance.
Please retain your proof of purchase for warranty claims.
9. Customer Support
For any questions, technical assistance, or warranty inquiries regarding your U UZOPI Electric Hand Warmer, please contact our customer support team.
You can typically find contact information on the official U UZOPI website or through your purchase platform.
