1. Introduction
The OCOOPA ZLS-118D is a portable, rechargeable hand warmer designed to provide warmth in cold conditions. Crafted from high-tech aircraft-grade aluminum and ABS material, it offers a smooth, comfortable, and anti-skid grip. This versatile device features multiple heating levels and can also function as a power bank for charging other electronic devices.

Image: The OCOOPA ZLS-118D hand warmer, highlighting its compact and ergonomic design.
2. Important Safety Information
To ensure safe operation and prolong the life of your OCOOPA hand warmer, please observe the following precautions:
- Do not expose the device to extreme temperatures (above 131°F or below 0°F).
- Do not disassemble, open, chop, pierce, or attempt to repair the device.
- Keep the device away from water, fire, and highly flammable materials.
- Supervise children when they are using the device.
- Do not use the heating function while simultaneously charging an external device.
- Charge the device at least every three months if not in regular use to maintain battery health.
3. Package Contents
Please check the box for the following items:
- OCOOPA ZLS-118D Hand Warmer
- USB-C Charging Cable
- User Manual
- Storage Pouch
4. Product Overview
Familiarize yourself with the key components and indicators of your hand warmer:
- Power/Warm Switch Button: Used to turn the device on/off and adjust heating levels.
- LED Battery Indicator: Displays remaining battery capacity.
- Temperature Light Indicator: Shows the current heating level.
- USB-C Charging Port: For charging the hand warmer.
- USB-A Output Port: For charging external devices (power bank function).

Image: Detailed view of the hand warmer's controls and ports.
5. Setup: Initial Charging
Before first use, fully charge your OCOOPA hand warmer.
- Connect the provided USB-C charging cable to the hand warmer's USB-C port.
- Plug the other end of the cable into a DC 5V power source (e.g., wall adapter, computer USB port).
- The LED battery indicator lights will illuminate to show charging progress. Blue lights indicate power capacity (1 light: 0-30%, 2 lights: 30-66%, 3 lights: 66-100%). The highest indicator light will flash blue during charging.
- Once all three blue lights are solid, the device is fully charged.
6. Operating Instructions
6.1. Turning On/Off and Adjusting Heat Levels
The OCOOPA ZLS-118D offers multiple heating modes for customizable warmth.
- To Turn On: Long press the Power/Warm Switch button for 3 seconds. The device will power on with red lights, indicating it is in warmer mode.
- To Adjust Heat Level: Short press the Power/Warm Switch button once to cycle through the available heating levels.
- To Turn Off: Long press the Power/Warm Switch button for 3 seconds. The indicator lights will turn off.
6.2. Heating Temperature Levels
The device features 3 main temperature levels, with options for single or double-sided heating:
- Low Temperature: One red light. Approximately 95-107.5°F.
- Medium Temperature: Two red lights. Approximately 104-118.5°F.
- High Temperature: Three red lights. Approximately 118.5-131°F.

Image: The hand warmer illustrating its single and double-sided heating capabilities.
7. Charging Function (Power Bank)
Your OCOOPA hand warmer can also serve as a portable power bank to charge other electronic devices.
- Connect your electronic device's charging cable to the hand warmer's USB-A output port.
- The hand warmer will automatically begin charging your device.
- Note: The heating function will automatically switch off when the device is used as a power bank. It does not support simultaneous heating and external device charging.
8. Maintenance
- Clean the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Store the hand warmer in a cool, dry place when not in use.
- If storing for extended periods, charge the device at least once every three months to prevent battery degradation.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery or device is off. | Charge the device fully. Long press the power button for 3 seconds. |
| Device is not heating. | Heating function is off or in power bank mode. | Ensure heating mode is activated (red lights). Disconnect any external devices from the USB-A port. |
| Device is not charging. | Faulty cable or power source. | Try a different USB-C cable or power adapter. Ensure the power source is active. |
| Device gets too hot. | High heat setting selected. | Cycle to a lower heat setting. The device has built-in safety to prevent overheating. |
10. Specifications
| Feature | Detail |
|---|---|
| Product Name | Hand Warmer |
| Model Name | ZLS-118D |
| Brand | OCOOPA |
| Battery Capacity | 5200 mAh |
| Input/Output | 5V/2A |
| Charging Time | 4-5 hours |
| Working Time | 6-12 hours (tested at 20°C ambient temperature) |
| Temperature Levels | Low: 95-107.5°F, Medium: 104-118.5°F, High: 118.5-131°F |
| Material | Pure Imported Aluminum + Imported flame retardant ABS material + Lithium Battery |
| Dimensions | 117 x 66 x 31 mm |
| Net Weight | 6.7 OZ (190g) |
| Gross Weight | 10.22 OZ (290g) |
11. Warranty and Support
The OCOOPA ZLS-118D Hand Warmer comes with a 1-Year Warranty from the date of purchase. This warranty covers manufacturing defects under normal use conditions.
For warranty claims, technical support, or any questions regarding your product, please contact OCOOPA customer service through the official channels provided at the point of purchase or on the OCOOPA website.
Please retain your proof of purchase for warranty validation.







