1. Important Safety Information
Read all safety warnings and instructions before operating this product. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury.
- Always wear appropriate safety gear, including eye protection and gloves.
- Keep bystanders at a safe distance during operation.
- Do not use this product if you are not experienced with powerful outdoor tools.
- Keep blades and moving parts away from skin and eyes.
- Always unplug or remove batteries before performing maintenance or cleaning.
- Ensure the work area is clear of debris and obstacles.
- Do not operate in wet conditions or rain.
2. Product Overview and Components
The Bamihui Cordless Weed Wacker is a versatile 2-in-1 tool designed for lawn and garden maintenance, functioning as both a brush cutter and a grass trimmer. It is powered by a 24V 4.0Ah battery system.

Figure 2.1: Complete product kit including the weed wacker, two batteries, charger, and various blades.
2.1 Included Components:
- 1 × Electric Weed Wacker unit
- 2 × 24V 4.0Ah Lithium-Ion Batteries
- 1 × Battery Charger
- 2 × 8" Circular Saw Blades (for thick branches and dense bushes)
- 2 × 9" Stainless Steel Blades (for weeds, reeds, and overgrown grass)
- 1 × Double-Head Screwdriver
- 1 × Wrench
- 1 × Anti-Collision Ring
- 1 × Shoulder Strap
- 1 × User Manual (this document)
2.2 Key Features:
- Powerful 1300W Motor: Delivers 20000 RPM for efficient cutting.

Figure 2.2: Close-up view of the powerful 1300W motor and aluminum alloy head.
- Long-Lasting 24V 4.0Ah Batteries: Two rechargeable batteries provide extended runtime.

Figure 2.3: Illustration of the 24V 4.0Ah battery, highlighting its capacity and runtime.
- 2-in-1 Functionality: Easily switch between circular saw blades for brush cutting and stainless steel blades for grass trimming.

Figure 2.4: Demonstrates the versatility of the tool with both circular and flat iron blades for different tasks.
- Ergonomic and Adjustable Design: Telescopic shaft (42-55 inches) and adjustable handle for comfortable use.

Figure 2.5: Shows the adjustable telescopic shaft and handle for user comfort and adaptability.
3. Setup and Assembly
The weed wacker requires some assembly before first use. Follow these steps carefully.
3.1 Charging the Batteries:
- Insert the 24V 4.0Ah battery into the charger.
- Plug the charger into a standard electrical outlet.
- Allow the battery to charge fully. The charger indicator light will change when charging is complete (refer to charger manual for specific light indications). Charging time is approximately 2.2 hours per battery.
- Always charge batteries in a well-ventilated area, away from flammable materials.
3.2 Assembling the Weed Wacker:
- Attach the Guard: Secure the anti-collision ring/guard to the trimmer head using the provided screws and screwdriver. Ensure it is firmly attached to prevent debris from striking the user.
- Install the Blade:
- For grass trimming: Attach the 9" stainless steel blade to the trimmer head. Use the wrench to tighten the retaining nut securely.
- For brush cutting: Attach the 8" circular saw blade to the trimmer head. Ensure it is properly aligned and secured with the retaining nut.
Note: Always ensure the blade is correctly installed and tightened before operation. Refer to the blade installation diagram in the quick start guide for visual instructions.
- Adjust the Telescopic Shaft: Loosen the locking collar on the shaft, extend or retract the shaft to your desired length (between 42-55 inches), and then firmly tighten the locking collar.
- Attach the Auxiliary Handle: Position the auxiliary handle for comfortable grip and secure it. This handle can be rotated 180 degrees for optimal ergonomics.
- Attach the Shoulder Strap: Connect the shoulder strap to the designated attachment points on the weed wacker. Adjust the strap length for balanced weight distribution and comfort during use.
4. Operating Instructions
Before operating, ensure you have read and understood all safety information and the unit is properly assembled.
4.1 Starting the Weed Wacker:
- Ensure a fully charged battery is inserted into the battery compartment until it clicks into place.
- Hold the main handle firmly with one hand and the auxiliary handle with the other.
- Press the safety lock button (if present) and then squeeze the trigger switch to start the motor. Release the safety lock button once the motor starts.
4.2 Operating Techniques:
- Grass Trimming:
Use the 9" stainless steel blade. Hold the trimmer at a slight angle to the ground and swing it in a sweeping motion, cutting small amounts of grass at a time. Avoid hitting hard objects like rocks or fences.

Figure 4.1: A user demonstrating proper technique for trimming a lawn with the weed wacker.
- Brush Cutting:
Switch to the 8" circular saw blade for thicker vegetation, small branches, or dense bushes. Approach the material slowly and allow the blade to reach full speed before making contact. Use a controlled, steady motion.
- Edging:
The trimmer head can be rotated for edging along sidewalks or driveways. Adjust the head angle as needed for precise cuts.
4.3 Stopping the Weed Wacker:
Release the trigger switch to stop the motor. The blade will stop spinning within a few seconds. Always remove the battery when not in use or before performing any adjustments or maintenance.
5. Maintenance
Regular maintenance ensures optimal performance and extends the life of your weed wacker. Always remove the battery before any maintenance procedures.
- Cleaning: After each use, clean the trimmer head, guard, and shaft with a damp cloth. Remove any grass, dirt, or debris that may have accumulated. Do not use harsh chemicals or abrasive cleaners.
- Blade Inspection: Regularly inspect the blades for sharpness, damage, or cracks. Replace dull or damaged blades immediately. A dull blade can reduce efficiency and put strain on the motor.
- Battery Care:
- Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
- Do not store fully discharged batteries for extended periods. Charge them periodically if not in use.
- Do not expose batteries to water or moisture.
- Storage: Store the weed wacker in a dry, secure location, out of reach of children. Ensure the battery is removed before storage.
6. Troubleshooting
This section addresses common issues you might encounter with your Bamihui Cordless Weed Wacker.
| Problem | Possible Cause | Solution |
|---|---|---|
| Weed wacker does not start. | Battery not charged or not inserted correctly. Safety lock not engaged. | Ensure battery is fully charged and properly seated. Press safety lock button before squeezing trigger. |
| Poor cutting performance. | Dull or damaged blade. Excessive material being cut. | Replace the blade. Cut smaller sections of material at a time. |
| Unit vibrates excessively. | Blade is bent or unbalanced. Loose components. | Inspect blade for damage and replace if necessary. Check all screws and connections for tightness. |
| Battery runtime is short. | Battery not fully charged. Battery nearing end of life. | Ensure battery is fully charged before use. Consider replacing battery if it no longer holds a charge. |
| Difficulty attaching guard/blades. | Screws too tight from factory or misaligned parts. | Apply firm, steady pressure when unscrewing. Ensure parts are correctly aligned before attempting to secure. If issues persist, contact customer support. |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Bamihui |
| Model Number | GCJ-3005 |
| Power Source | Battery Powered |
| Motor Power | 1300W |
| Speed | 20000 RPM |
| Battery Type | 24V 4.0Ah Lithium Ion (2 included) |
| Charging Time | Approx. 2.2 hours per battery |
| Cutting Width (Circular Blade) | 8 Inches |
| Cutting Width (Stainless Steel Blade) | 9 Inches |
| Adjustable Shaft Length | 42" - 55" |
| Item Weight | 6.16 pounds (2.8 Kilograms) |
| Assembly Required | Yes |
| UPC | 736963211640 |
8. Warranty and Support
Bamihui stands behind the quality of its products.
- Warranty: This product comes with a 180-day warranty for quality issues, offering free replacement.
- Technical Support: Lifetime technical support is provided for this product.
- For warranty claims, technical assistance, or any questions regarding your Bamihui Cordless Weed Wacker, please contact the manufacturer's customer service. Refer to the product packaging or the seller's information for contact details.