Introduction
This manual provides detailed instructions for the safe and effective use of your Merwish 8000mAh Portable Jump Starter and Tire Inflator Compressor. This multi-functional device is designed to provide emergency vehicle jump-starting, tire inflation, and portable power for electronic devices. Please read this manual thoroughly before first use and keep it for future reference.

Image: The Merwish 8000mAh Portable Jump Starter and Tire Inflator Compressor shown with its jump starter clamps, air hose, and various inflation nozzles, resting on the ground next to a car tire, illuminated by sunlight.
Safety Instructions
Always observe the following safety precautions to prevent injury or damage to the device and your vehicle.
- Do not operate the device if it is damaged.
- Keep out of reach of children.
- Ensure proper ventilation during use and charging.
- Do not expose to rain or extreme temperatures.
- Connect the jump starter clamps correctly: red to positive (+), black to negative (-).
- Avoid short-circuiting the clamps.
- Do not over-inflate tires; always check recommended pressure.
- Disconnect the device from the vehicle battery immediately after jump-starting.
- Use only the provided accessories.
Product Components
The package typically includes the following items:
- Merwish 8000mAh Jump Starter and Tire Inflator
- Jump starter cables (battery clamps)
- Air hose with car valve connector
- USB charging cable
- Various inflation nozzles (bicycle valve, ball needle, inflatable product nozzles)
- User Manual

Image: The Merwish 8000mAh Portable Jump Starter and Tire Inflator Compressor displayed with its full set of accessories, including jump starter clamps, air hose, USB cable, and various inflation nozzles.
Product Features
- 8000mAh Powerful Battery: High-capacity battery for quick vehicle jump-starting.
- Emergency Jump Starter: Safely starts your vehicle in seconds when the battery is dead.
- Electric Tire Inflator Compressor: Powerful air pump for car, motorcycle, bicycle tires, and balls.
- Dual Digital Display: Easily monitor tire pressure and device status.
- USB Power Bank Function: Charge phones and other electronic devices via the USB output.
- Multi-functional Accessory Set: Includes ball needle, bicycle valve, and inflatable product nozzles for versatile use.
- Compact and Portable Design: Easy to carry in a car trunk, ideal for travel and emergencies.
- Built-in Cooling Fan: Ensures optimal performance and device longevity.
- Measurement Modes: Supports PSI / BAR / KPA / Kg/cm² for pressure readings.

Image: A graphic illustrating the key features of the device, including its 8000mAh battery, dual digital display, USB output, and cooling fan.
Setup and Charging
Initial Charging
Before first use, fully charge the device. Connect the provided USB charging cable to the device's input port and a suitable USB power adapter (not included). The digital display will indicate the charging status. A full charge typically takes several hours.
Checking Battery Level
Press the power button briefly to check the current battery level on the digital display. Ensure the device is sufficiently charged before attempting to jump-start a vehicle or inflate tires.
Operating Instructions
1. Jump Starting a Vehicle
- Ensure the jump starter is at least 75% charged.
- Turn off your vehicle's ignition and all accessories.
- Connect the red (+) clamp to the vehicle battery's positive (+) terminal.
- Connect the black (-) clamp to the vehicle battery's negative (-) terminal or a solid metal part of the engine block (away from the battery).
- Ensure the clamps are securely attached.
- Start your vehicle. If it doesn't start immediately, wait 30 seconds and try again. Do not crank for more than 3 seconds per attempt.
- Once the vehicle starts, immediately disconnect the black (-) clamp first, then the red (+) clamp.

Image: A person crouching next to a car, connecting the jump starter clamps to the vehicle's battery terminals, with the Merwish device visible on the ground.
2. Inflating Tires and Other Items
- Connect the air hose to the device's air output port.
- Select the appropriate nozzle for the item you wish to inflate (car tire, bicycle tire, ball, inflatable toy).
- Attach the nozzle securely to the item's valve.
- Turn on the device. The digital display will show the current pressure.
- Use the '+' and '-' buttons to set the desired pressure. You can switch between PSI, BAR, KPA, and Kg/cm² using the mode button.
- Press the inflation button to start the compressor. The device will automatically stop when the preset pressure is reached.
- Disconnect the nozzle and air hose.

Image: The Merwish 8000mAh Portable Jump Starter and Tire Inflator Compressor positioned next to a car tire, with its air hose connected to the tire valve, indicating active inflation.

Image: A visual representation of the multi-functional accessories, including nozzles for car valves, bicycle valves, inflatable products, and ball needles.
3. Using as a Power Bank
Connect your electronic device (e.g., smartphone, tablet) to the USB output port of the Merwish device using a compatible USB cable. The device will automatically begin charging your electronic device.
4. Using the LED Light
Press the light button to turn on the built-in LED light. Press again to cycle through different light modes (e.g., steady, strobe, SOS) if available. Press a third time to turn off the light.
Maintenance
- Charging: Recharge the device every 3-6 months, even if not in use, to maintain battery health.
- Cleaning: Wipe the device with a soft, dry cloth. Do not use harsh chemicals or abrasives.
- Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Care: Avoid fully discharging the battery frequently to prolong its lifespan.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery. | Charge the device fully. |
| Vehicle does not jump-start. | Incorrect clamp connection; vehicle battery completely dead; device battery too low. | Check clamp polarity and connection; ensure device is fully charged; consult a mechanic if battery is severely damaged. |
| Tire inflator not working or inflating slowly. | Air hose not securely connected; nozzle blockage; device battery low. | Ensure all connections are tight; check nozzles for debris; charge the device. |
| USB charging not working. | Device battery low; incompatible USB cable; device not turned on. | Charge the device; try a different USB cable; ensure device is powered on. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | CZK-DH01C |
| Battery Capacity | 8000mAh |
| Battery Cell Composition | Lithium Ion |
| Voltage | 12 Volt |
| Functions | Jump Starter, Tire Inflator, Power Bank |
| Display | Dual Digital Screen |
| Pressure Measurement Units | PSI / BAR / KPA / Kg/cm² |
| USB Output | Yes |
| Dimensions (L x W x H) | 16.3 x 7.7 x 5.7 cm |
| Compatible Vehicle Type | Passenger Car (Universal Fit) |
| Included Components | Battery jump starter cable |
| Country of Origin | China |

Image: A detailed view of the Merwish 8000mAh Portable Jump Starter and Tire Inflator Compressor, highlighting its dimensions (16.3cm x 7.7cm x 5.7cm).
Warranty and Support
The Merwish CZK-DH01C comes with a 1-year warranty from the date of purchase, covering manufacturing defects. For warranty claims or technical support, please contact Merwish customer service through the retailer where the product was purchased.
For further assistance, please refer to the official Merwish website or contact their support team.
Manufacturer: Merwish
Brand: Merwish