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Best picks
The RYOBI 40V HP kit is the broad-cut pick for demanding trimming; DEWALT DCST925M1 balances a smaller cut with an included pack, and STIHL FSA 57 suits lighter work.
Quick answer
For a substantial lawn and dense growth, the RYOBI RY40HPST02K combines a 17-inch adjustable swath with a 4Ah kit battery. DEWALT DCST925M1 is the pick for a ready-to-use 20V kit, while STIHL FSA 57 Set and the compact FSA 30 suit lighter, more controlled trimming.
Official manufacturer image
Best for wide-cut, demanding yard work
Drawback: The larger cutting path and power system can be unnecessary for small lawns.
Best for an included-battery 20V option
Drawback: The 13-inch swath means more passes than wider trimmers on open ground.
Official manufacturer image
Best for adjustable fit and simple reloading
Drawback: The line head is intended for grass and light weeds, not woody brush.
Official manufacturer image
Best for small yards and edging detail
Drawback: STIHL lists up to 19 minutes with the PolyCut head on a full charge.
Official manufacturer image
Best for an attachment-capable mid-platform
Drawback: Its listed tool weight is 13.69 lb, a notable consideration for prolonged use.
| Official manufacturer imageRYOBI RY40HPST02K | DEWALT DCST925M1 | Official manufacturer imageSTIHL FSA 57 Set | Official manufacturer imageSTIHL FSA 30 | Official manufacturer imageGreenworks 40V 14/16-inch Brushless String Trimmer | |
|---|---|---|---|---|---|
| Platform | 40V HP | 20V MAX | AK | AS | 40V |
| Swath | 15–17 in | 13 in | — | — | 14/16 in |
| Battery / charger included | 4Ah / yes | 4.0Ah / yes | AK 10 / AL 101 | AS 2 / AL 1 | 4.0Ah / yes |
| Line or head | .095 in line and attachments | 0.080 in line | AutoCut C 3-2 | PolyCut 3-2 | .080 in; bump feed |
| Published use detail | Up to 45 min with 4Ah | Variable speed trigger | Refill without tools | Up to 19 min PolyCut | 13.69 lb tool weight |
| Check price on Amazon.ca | Check price on Amazon.ca | Check price on Amazon.ca | Check price on Amazon.ca |
Common questions
They are common names for the same kind of battery-powered line trimmer. Some models also accept blade heads or other attachments, so check the exact cutting system for your intended work.
Some larger models are designed for heavier growth. RYOBI describes the RY40HPST02K for tough weeds and brush with a 17-inch adjustable swath and .095-inch line; match the head and line to the material and manual.
Runtime depends on battery capacity, cutting load and speed. Published figures are model-specific; RYOBI lists 45 minutes with a 4Ah battery for its RY40HPST02K, while STIHL gives different FSA 30 runtimes by head.
Battery platforms are generally brand and system specific. Use only a pack the manufacturer lists as compatible with the exact trimmer.
Keep exploring
Choose by the work first: line trimmers suit routine grass edges, while wider or multi-blade tools target different yard tasks. Battery compatibility and head design help narrow the field.
Choose a compact trimmer for edging and light growth, or a wider, higher-voltage model for longer sessions. Check whether each listing includes its battery and charger.
The FSA 45 is a compact option with an integrated battery; the FSA 57 Set adds a replaceable AK battery and charger. Choose by yard size and how you want to manage runtime.