1. Introduction
Thank you for choosing the SENIX 20V 10'' Cordless Weed Wacker. This versatile tool is designed for efficient and reliable lawn care, offering both trimming and edging capabilities. Its powerful brushless motor ensures consistent performance, while the telescopic shaft and adjustable head provide ergonomic comfort and ease of use. This manual provides essential information for the safe and effective operation, assembly, and maintenance of your new tool.
What's Included:
- String trimmer
- 2.5Ah lithium-ion battery
- 2A charger
- Auxiliary handle mounting hardware
- Head shield
- Mounting screw

2. Safety Information
WARNING: To reduce the risk of injury, the user must read this instruction manual thoroughly before operation.
WARNING: Do NOT connect any power (battery) before making any adjustments or performing maintenance on the tool.
Personal Protective Equipment (PPE):
Always wear appropriate personal protective equipment when operating the weed wacker. This includes, but is not limited to, safety glasses, hearing protection, long pants, sturdy footwear, and protective gloves.

3. Setup and Assembly
Follow these steps to assemble your SENIX Cordless Weed Wacker. Ensure the battery is removed before beginning assembly.
3.1 Unpacking
Carefully open the product box and remove all components. Inspect for any damage. Refer to the included parts list to ensure all items are present.

3.2 Shaft Assembly
- Align the middle pipe with the lower pipe, ensuring the internal wiring is not pinched.
- Push the pipes together until they click into place, securing the connection.
- Repeat the process for the upper pipe, connecting it to the middle pipe.
3.3 Guard Installation
- Position the head shield over the trimmer head, aligning the tabs and slots.
- Press firmly until the guard snaps securely into place.
- Ensure the guard is properly seated and does not wobble.
3.4 Battery Installation/Removal
To install the battery, slide it into the battery slot on the tool handle until it clicks securely. To remove, press the unlock button on the battery and slide it out.

Assembly Video Guide:
This video provides a detailed guide on unpacking and assembling the SENIX 20V Cordless Grass String Trimmer and Edger, including connecting the shaft sections, installing the guard, and attaching the battery.
4. Operating Instructions
Your SENIX Cordless Weed Wacker is designed for ease of use and versatility in various lawn care tasks.
4.1 Powering On/Off
To operate the tool, first ensure the battery is securely installed. Press the safety switch (usually a button or lever) and then squeeze the trigger to start the motor. Release the trigger to turn off the tool.
4.2 Adjustable Head and Handle
The auxiliary handle can be adjusted for improved ergonomics and comfort during operation. The trimmer head also features an adjustable angle, allowing you to customize it for different cutting needs.

4.3 Telescoping Shaft
The telescoping shaft allows for easy adjustment of the tool's length, accommodating users of different heights and improving reach in various situations. This also aids in compact storage.

4.4 2-in-1 Trimming & Edging
This tool offers a 2-in-1 function, allowing you to switch between trimming and edging modes. The 360-degree turn capability enables precise cuts for both tasks.

4.5 Auto Line Feed
The trimmer features an automatic line feed system, which advances the .065" trimmer line as needed without manual intervention, ensuring continuous cutting performance.

Operation Demonstration Video:
This video demonstrates the SENIX 20V Cordless Grass String Trimmer in action, showcasing its trimming and edging capabilities.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your SENIX weed wacker.
5.1 Battery Charging
The 2.5Ah lithium-ion battery can fully charge in approximately 90 minutes. Always ensure the battery is fully charged before use for optimal run time (up to 38 minutes).

5.2 Cleaning and Storage
- After each use, disconnect the battery and clean the trimmer head and guard to remove grass clippings and debris.
- Use a dry cloth or soft brush for cleaning. Do not use harsh chemicals or abrasive materials.
- Store the tool in a dry, secure location, away from direct sunlight and extreme temperatures.
6. Troubleshooting
If you encounter any issues with your SENIX Cordless Weed Wacker, please refer to the following general advice:
- Tool not starting: Ensure the battery is fully charged and properly inserted. Check that the safety switch is engaged before pressing the trigger.
- Poor cutting performance: Check the trimmer line for wear or breakage. Ensure the line is feeding correctly.
- Unusual noise or vibration: Discontinue use immediately. Check for loose parts, damaged components, or obstructions in the cutting head.
For more detailed troubleshooting or persistent issues, please contact SENIX customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | SENIX |
| Model Number | Cordless Grass String Trimmer Edger Tool (GTX2-M) |
| Power Source | Battery Powered (20V Max) |
| Battery Type | 1 Lithium Ion battery required (included) |
| Battery Capacity | 2.5 Ah |
| Charging Time | Approx. 90 minutes |
| Item Weight | 4.32 Pounds |
| Cutting Width | 10 Inches |
| Product Dimensions | 38.98"L x 9.84"W |
| Speed | 7000 RPM |
| Assembly Required | Yes |
| Cordless | Yes |
| Recommended Uses | Edging, Trimming |
| Country of Origin | China |
8. Warranty and Support
Your SENIX 20V 10'' Cordless Weed Wacker comes with a 5-year limited warranty for peace of mind. This warranty covers defects in materials and workmanship under normal use.
Customer Support:
For warranty claims, technical assistance, or any questions regarding your product, please visit the official SENIX website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty purposes.
Visit the SENIX Store for more information and product accessories.