Mrzneaoch K80
Mrzneaoch Electric Weed Wacker 21V String Trimmer User Manual
Model: K80
Brand: Mrzneaoch
Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Mrzneaoch Electric Weed Wacker. This cordless string trimmer is designed for various lawn and garden trimming tasks, including pruning lawns, branches, and bushes. Its lightweight and portable design, combined with a telescopic pole, offers versatility for different user needs and applications.

Figure 1: Mrzneaoch Electric Weed Wacker and included accessories, including batteries, charger, and various cutting blades.
Safety Instructions
Always observe the following safety precautions to reduce the risk of injury or damage:
- Read the entire manual before operation.
- Wear appropriate personal protective equipment (PPE), including eye protection, gloves, and sturdy footwear.
- Ensure the work area is clear of debris, rocks, and other objects that could be thrown by the trimmer.
- Keep bystanders, children, and pets at a safe distance (at least 15 meters/50 feet) from the operating area.
- Do not operate the trimmer in wet conditions or rain.
- Always remove the battery before performing any assembly, cleaning, or maintenance.
- Do not modify the trimmer or use non-approved accessories.
- Store the trimmer and batteries in a dry, secure location, out of reach of children.
Setup and Assembly
1. Battery Charging
The Mrzneaoch Electric Weed Wacker uses 21V lithium-ion batteries. Fully charge the batteries before first use.
- Connect the charger to a standard power outlet.
- Insert the battery into the charger. The indicator light on the charger will show the charging status.
- A full charge typically takes approximately 1 hour.
- Once charged, disconnect the battery from the charger and unplug the charger from the outlet.

Figure 2: The 21V lithium-ion battery features multiple protection mechanisms including over-heating, over-charge, over-voltage, over-current, and over-discharge protection.
2. Handle and Pole Assembly
Attach the auxiliary handle and adjust the telescopic pole for comfortable operation.
- Slide the auxiliary handle onto the main shaft and secure it at a comfortable position using the provided fasteners.
- Adjust the telescopic pole by loosening the locking mechanism, extending or retracting the pole to your desired length (adjustable total length: 90-120 cm), and then tightening the locking mechanism.
3. Blade Installation
The trimmer comes with various cutting blades: plastic blades, stainless steel blades, and an alloy saw blade. Choose the appropriate blade for your task.
- Ensure the battery is removed from the trimmer.
- Place the trimmer head on a flat surface.
- Align the chosen blade with the spindle and secure it using the provided wrench and fasteners. Ensure the blade is firmly attached and rotates freely without wobble.
- The grass baffle should be in place to prevent debris from splashing.

Figure 3: Illustration of the portable installation for the 3-in-1 multifunctional blade, demonstrating its versatility for different trimming angles and applications.
Operating Instructions
1. Starting and Stopping
- Insert a fully charged battery into the battery slot until it clicks into place.
- Hold the trimmer firmly with both hands, ensuring a balanced grip.
- To start, press the safety lock button (if present) and then squeeze the trigger switch.
- To stop, release the trigger switch.
2. Trimming Techniques
For optimal results and safety, use the following techniques:
- Sweeping Motion: Move the trimmer from side to side in a sweeping motion, cutting small amounts of grass with each pass.
- Edging: For clean edges along sidewalks or driveways, tilt the trimmer head to a 90-degree angle (if adjustable) and walk slowly along the edge.
- Around Obstacles: Use caution when trimming around trees, fences, or other obstacles. The anti-collision wire frame helps reduce blade loss and prevents accidental contact.
- Adjustable Head: The 90-degree adjustable trimmer head allows access to hard-to-reach areas. Adjust as needed for different tasks.

Figure 4: A user demonstrating the operation of the Mrzneaoch Electric Weed Wacker for lawn trimming, highlighting its cordless convenience.
Maintenance
Regular maintenance ensures the longevity and performance of your trimmer.
- Cleaning: After each use, remove the battery and clean the trimmer head, guard, and shaft with a damp cloth. Remove any accumulated grass or debris. Do not use harsh chemicals.
- Blade Replacement: Inspect blades regularly for wear or damage. Replace plastic blades frequently. Stainless steel and alloy saw blades should be replaced if they become dull or bent. Always use genuine Mrzneaoch replacement blades.
- Battery Care: Store batteries in a cool, dry place. Do not expose them to extreme temperatures. Charge batteries fully before long-term storage.
- Storage: Store the trimmer in a dry, secure location, away from direct sunlight and moisture. The compact design allows for horizontal stacking in a car trunk or convenient home storage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Trimmer does not start. | Battery not inserted correctly or not charged. | Ensure battery is fully charged and properly seated. |
| Reduced cutting performance. | Dull or damaged blade. | Replace the cutting blade. |
| Excessive vibration. | Blade not installed correctly or damaged. | Check blade installation; replace if damaged. |
| Short operating time. | Battery not fully charged or nearing end of life. | Ensure battery is fully charged. Consider replacing battery if performance consistently degrades. |
Specifications
- Product Name: Grass Trimmers / Garden Strimmer / Lithium Battery Strimmer
- Product Material: Steel pipe, ABS, Motor
- Model Number: K80
- No-load Speed: 6000 rpm/min
- Battery: 21V Lithium-ion, 9000mAh
- Motor Power: 1880W
- Charging Time: Approximately 1 hour
- No-load Time: 2-3 hours
- Adjustable Length: Telescopic pole, 90-120 cm total length
- Item Weight: 2 kg (4.4 lbs)
- Product Dimensions: 96.52 x 10.16 x 17.78 cm

Figure 5: The Mrzneaoch Electric Weed Wacker, weighing only 2 kg, demonstrating its lightweight and easy-to-handle design for extended use.
Warranty and Support
For any questions, concerns, or support needs regarding your Mrzneaoch Electric Weed Wacker, please contact our customer service team.
We offer 24-hour friendly customer service to assist you with any inquiries.
Please refer to your purchase documentation for specific warranty details.