Introduction
The AUIIAH YZE-B23 rechargeable hand warmers provide warmth and serve as a portable power bank. This product includes two separate units, each with a 14000mAh capacity, offering extended heating duration. They feature an LED display for power and heating levels, and an integrated LED light for illumination.

Image: One AUIIAH hand warmer displaying 100% charge, illustrating its 14000mAh capacity and up to 36 hours of warmth for a 2-pack.
Initial Setup
Charging the Hand Warmers
- Before first use, fully charge both hand warmers.
- Connect the provided charging cable to the hand warmer's charging port and to a suitable USB power adapter (not included).
- The LED display will indicate charging status. A full charge typically takes 3-4 hours.
- Ensure the hand warmers are fully charged for optimal performance and battery life.

Image: Illustration of hand warmers being charged and one hand warmer functioning as a power bank for a smartphone.
Operating Instructions
Power On/Off
- To turn on the hand warmer, long press the power switch for approximately 3 seconds. It will activate single-sided heating at level L1 (100.4-107.6℉).
- To turn off the hand warmer, long press the power switch again for approximately 3 seconds.
Adjusting Heating Modes and Temperature
- Switching between Single and Double-sided Heating: While the device is on, long press the TEMP control button for 3 seconds to toggle between single-sided (L modes) and double-sided (H modes) heating.
- Changing Temperature Levels: Once the desired heating mode (single or double-sided) is selected, short press the TEMP control button to cycle through the 4 temperature levels.
Temperature Levels:
- Single-sided Heating (L modes):
- L1: 100.4-107.6℉ (Up to 18 hours warmth)
- L2: 109-114.8℉ (Up to 15 hours warmth)
- L3: 116.6-122℉ (Up to 12 hours warmth)
- L4: 123.8-131℉ (Up to 10 hours warmth)
- Double-sided Heating (H modes):
- H1: (Temperature not specified, up to 12 hours warmth)
- H2: (Temperature not specified, up to 10 hours warmth)
- H3: (Temperature not specified, up to 8 hours warmth)
- H4: (Temperature not specified, up to 6 hours warmth)

Image: Visual representation of single-sided and double-sided heating modes with their approximate duration at different levels.
LED Display
The integrated LED display shows the remaining battery power percentage and the current heating level (L1-L4 or H1-H4). This allows you to monitor the device's status at a glance.

Image: The LED display indicating 100% battery and heating level L1.
Power Bank Function
Each hand warmer can also function as an emergency power bank. Connect your smartphone or other USB-powered device to the hand warmer's output port using a compatible charging cable to charge your device.
LED Light
The hand warmer includes a built-in LED light. To activate or deactivate the light, short press the dedicated light button (if available, otherwise assume it's integrated with power button or another control). This provides illumination in dark environments.

Image: The hand warmer with its integrated LED light turned on, providing illumination.
Care and Maintenance
- 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 warmers in a cool, dry place. Ensure they are fully charged before storing to maintain battery health. Recharge every 3-6 months if stored for a long time.
- Battery Care: Avoid extreme temperatures (hot or cold) as they can affect battery performance and lifespan.
Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| Hand warmer does not turn on. | Low battery; Incorrect power button press. | Charge the hand warmer fully. Ensure you are long-pressing the power button for 3 seconds. |
| Hand warmer is not heating. | Heating function not activated; Low battery. | Ensure the device is powered on and a heating level (L1-L4 or H1-H4) is selected. Check battery level and recharge if necessary. |
| Device not charging. | Faulty cable/adapter; Loose connection. | Try a different USB cable and power adapter. Ensure connections are secure. |
| Power bank function not working. | Low battery on hand warmer; Incompatible charging cable for external device. | Ensure the hand warmer has sufficient charge. Use the correct charging cable for your external device. |
Product Specifications
- Model: YZE-B23
- Battery Capacity: 14000mAh (7000mAh per unit)
- Battery Type: Lithium Polymer (included)
- Material: Aluminum/PC
- Product Dimensions (each unit): 2.09 x 1.24 x 4.02 inches
- Weight (each unit): Approximately 7.76 ounces
- Max Heating Temperature: 131℉ (55℃)
- Heating Levels: 8 modes (4 single-sided, 4 double-sided)
- Warmth Duration: 6-18 hours (single unit), 6-36 hours (2-pack combined usage)
- Features: LED Display, LED Light, Power Bank Function
Warranty and Customer Support
For warranty information, technical support, or any product-related inquiries, please contact the seller or manufacturer directly. Refer to your purchase documentation for specific contact details and warranty terms.





