Check the parts and model instructions
Lay out the trimmer, guard, handles, fasteners and accessories. Compare them with the parts list in the manual for your exact model; do not assemble a damaged or incomplete tool.
Gearjury may earn a commission from qualifying retailer links. Editorial content is based on the sources shown.
Guide
How to Assemble a Cordless Grass Trimmer Safely
Assemble the guard, handle and shaft in the order shown in the manual, with the battery removed until the tool is ready to use.
Fit the guard
With the battery removed, place the guard in its specified position and secure it with the supplied fasteners. Make sure the line-cutting blade or deflector is oriented as shown in the instructions.
Attach and adjust the handle
Install the front or auxiliary handle at the marked position and tighten its fastener as directed. Set the angle for a secure two-handed grip without obstructing the controls.
Connect a split shaft if supplied
Align the shaft sections and coupler marks, insert the lower shaft fully and lock the coupling. Do not force a connection that will not seat smoothly; consult the manual for its locking method.
Inspect the head and fit the battery
Check that the cutting head and line are installed correctly, all fasteners are secure and the guard is in place. Insert the battery only after assembly is complete and the switch is off.
Choose and use the trimmer safely
Start in a clear area, hold both handles and keep the line parallel to the ground as instructed. Stop the tool and remove the battery before adjustments, cleaning or clearing entangled material.
Common questions
Questions before you buy
How do I choose a cordless string trimmer?
Match cutting width, battery platform, tool weight and line-feed style to your yard and trimming tasks. Confirm whether the package includes a battery and charger.
How do I assemble a PowerSmart 20V cordless string trimmer?
Use the manual for the exact PowerSmart model to fit its guard, handle and shaft components. Keep the battery removed until assembly and inspection are complete.
How do I use a cordless grass trimmer?
Wear the required protective equipment, hold both handles, keep bystanders clear and follow the model instructions for cutting angle and line feed.
How do I clean a battery-powered weed eater?
Switch it off and remove the battery first. Brush debris from the guard and head with the cleaning method approved in the manual; do not rinse electrical parts.
Sources and how we chose
- DEWALT string trimmer manuals and product range · 2026-10-23
- EGO string trimmer attachment owner information · 2026-10-23
Keep exploring
Related guides
Cordless Strimmers: Find the Right Battery-Powered Tool
Choose a cordless strimmer around your yard, cutting tasks and battery platform. Browse dedicated trimmers, trimmer-edger combinations and practical guides.
Grass Strimmer Cordless Options for Different Yards
Compare battery platforms, cutting widths and line systems to shortlist a cordless trimmer for your yard.
Weed Eater Battery-Powered Models for Home Yards
Battery kits simplify setup, while tool-only models suit buyers who already own a matching platform.
Cordless Ryobi Strimmer Options for Different Yards
Compare battery platform, stated swath and kit inclusions across RYOBI cordless models.