1. Introduction
This manual provides essential information for the safe and effective use of your DEWINNER 20V Cordless Grass Trimmer, model DWT2575. Please read these instructions carefully before assembly, operation, or maintenance. Keep this manual for future reference.
2. Safety Instructions
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury.
- Wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and sturdy footwear.
- Keep children and pets away from the work area.
- Ensure the battery is removed before cleaning, maintenance, or when the tool is not in use.
- Do not operate the trimmer in wet conditions or rain.
- Inspect the work area for debris, rocks, or other objects that could be thrown by the cutting line.
- Use only DEWINNER approved replacement parts and accessories.
- Maintain a firm grip on the tool with both hands during operation.
- Avoid contact with the cutting line while the tool is running.
- Do not modify the tool or use it for purposes other than those described in this manual.
3. Product Components
Familiarize yourself with the parts of your DEWINNER Grass Trimmer.

Figure 3.1: Labeled Components of the DEWINNER Grass Trimmer
This image displays the main components of the grass trimmer, including the operating handle, on/off switch, battery pack, lock-off button, assist handle, handle adjusting button, telescopic knob, locking knob for support rollers, nose adjustment button, support rollers, plant guard, and line spool.
- Operating Handle: Main grip for controlling the trimmer.
- On/Off Switch: Activates and deactivates the motor.
- Battery Pack: Provides power to the trimmer.
- Lock-off Button: Safety feature to prevent accidental startup.
- Assist Handle: Adjustable secondary handle for improved control.
- Handle Adjusting Button: Allows adjustment of the assist handle position.
- Telescopic Knob: Adjusts the length of the trimmer shaft.
- Nose Adjustment Button: Used to rotate the trimmer head for edging.
- Support Rollers: Wheels for easier edging and maneuverability.
- Plant Guard: Protects plants and delicate objects from the cutting line.
- Line Spool: Contains the cutting line.
4. Setup and Assembly
Follow these steps to assemble your grass trimmer before first use.
- Attach the Assist Handle: Slide the assist handle onto the main shaft and secure it using the handle adjusting button to your preferred position.
- Install the Safety Guard: Securely attach the safety guard over the cutting head. Ensure it is firmly in place to prevent debris from being thrown.
- Attach Support Rollers (Optional): If using the trimmer for edging, attach the support rollers to the designated points on the shaft.
- Charge the Battery: Insert the 20V Lithium-ion battery into the provided charger. Allow it to charge fully before first use. The charger typically takes one hour for a full charge.
- Insert the Battery: Once charged, slide the battery pack into the battery slot on the main handle until it clicks into place.

Figure 4.1: Trimmer Components and Accessories
This image shows the main trimmer unit, the assist handle, support wheels, two line spools, a battery charger, and a 20V battery pack, illustrating all items included for assembly.
5. Operating Instructions
5.1 Basic Trimming
- Adjust Length: Use the telescopic knob to adjust the shaft length to a comfortable working height.
- Adjust Handle: Position the assist handle for optimal balance and control.
- Start the Trimmer: Press the lock-off button and then squeeze the on/off switch to start the motor.
- Trimming Technique: Hold the trimmer firmly and move it in a sweeping motion across the area to be trimmed. Keep the cutting head slightly above the ground.
- Automatic Line Feed: The trimmer features an automatic line feed system. If the line becomes too short, it will automatically extend when the trimmer is running.

Figure 5.1: Proper Trimming Posture
A user is shown operating the DEWINNER grass trimmer in a garden, demonstrating a comfortable and controlled posture for effective trimming.
5.2 Edging Function (2-in-1)
- Rotate Trimmer Head: Press the nose adjustment button and rotate the trimmer head 90 degrees to the edging position.
- Engage Support Rollers: Ensure the support rollers are attached and positioned to guide the trimmer along the edge of your lawn or pathway.
- Start Edging: With the trimmer head rotated and rollers engaged, start the trimmer and guide it along the desired edge. The rollers help maintain a consistent cutting depth.

Figure 5.2: 90-Degree Head Rotation for Edging
This image illustrates the trimmer head rotating 90 degrees, a feature designed to convert the tool from a trimmer to an edger, allowing for precise cuts along lawn borders.

Figure 5.3: Trimmer in Edging Configuration
The image shows the trimmer with its head rotated and support wheels engaged, ready for edging tasks, highlighting its 180-degree and 360-degree rotation capabilities for versatile use.
5.3 Adjusting Handle and Shaft
- Telescopic Shaft: Loosen the telescopic knob, adjust the shaft to the desired length (36.6 to 44.5 inches), and tighten the knob.
- Assist Handle: Press the handle adjusting button to change the angle or position of the assist handle for comfort. The handle can rotate 180 degrees.

Figure 5.4: Adjustable Handle and Shaft Features
This diagram illustrates the 180-degree vertical adjustment and 360-degree arbitrary rotation of the assist handle, along with the telescopic shaft, allowing users to customize the trimmer for ergonomic operation.
6. Maintenance
Regular maintenance ensures optimal performance and extends the life of your trimmer.
- Battery Removal: Always remove the battery pack before performing any maintenance or cleaning.
- Cleaning: After each use, clean the trimmer head, safety guard, and housing with a damp cloth. Remove any grass clippings or debris. Do not use harsh chemicals.
- Line Replacement: When the cutting line is depleted, replace the line spool with a DEWINNER approved replacement. Refer to the product packaging for compatible line specifications.
- Storage: Store the trimmer in a dry, secure place, out of reach of children. Ensure the battery is removed for long-term storage.
- Battery Care: Store the battery in a cool, dry place. Do not store fully discharged batteries for extended periods.

Figure 6.1: Safety and Heat Management Features
This image highlights the safety button on the handle to prevent accidental starts and the heat emission holes on the motor housing, which are crucial for maintaining the tool's performance and longevity during use.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Trimmer does not start. | Battery not inserted correctly or discharged. Safety lock-off button not pressed. | Ensure battery is fully charged and correctly inserted. Press the lock-off button before squeezing the trigger. |
| Cutting line does not extend. | Line tangled or depleted. | Remove battery, inspect the line spool for tangles, or replace the line spool if depleted. |
| Reduced cutting performance. | Cutting line too short or worn. | Allow the automatic line feed to extend the line, or replace the line spool. |
| Excessive vibration. | Debris caught in the cutting head. | Remove battery, clear any debris from the cutting head and guard. |
8. Specifications
- Model: DWT2575
- Brand: DEWINNER
- Power Source: 20V Lithium-ion Battery
- Battery Capacity: 2.0Ah (included)
- Charger: 1-hour fast charger (included)
- Cutting Width: 23 cm (9 inches)
- Weight (with battery): Approximately 2.0 kg (4.4 lbs)
- Adjustable Shaft Length: 36.6 to 44.5 inches (93 cm to 113 cm)
- Head Rotation: 90 degrees for edging
- Handle Rotation: 180 degrees
- UPC: 741157361322
9. Warranty and Support
DEWINNER provides a commitment to quality and support for its products.
- Spare Parts Availability: Spare parts for this product are available for 5 years from the date of purchase.
- For further assistance, technical support, or warranty claims, please contact DEWINNER customer service through your retailer or the official DEWINNER website.
10. Environmental Protection
Do not dispose of electrical appliances or batteries with household waste. Please recycle where facilities exist. Check with your local authority for recycling advice.




