Keeping lawn edges sharp makes the whole yard look intentional. A reliable weed wacker handles the places your mower skips: fence lines, garden borders, tree bases, and sidewalk cracks. The five picks below cover gas, corded, and battery options across a range of lot sizes and budgets.
| Product | Best For | Rating |
|---|---|---|
| DEWALT DCST972X1 | Large yards, pros | 4.8/5 |
| EGO Power+ ST1521S | Mid-size yards | 4.7/5 |
| Greenworks 21362 | Small yards, quiet zones | 4.5/5 |
| Husqvarna 128LD | Heavy brush, gas power | 4.6/5 |
| BLACK+DECKER LSTE525 | Light touch-ups, beginners | 4.3/5 |
DEWALT DCST972X1 — Best for Large Yards
The DEWALT DCST972X1 runs on a 60V MAX FlexVolt battery and swings a 15-inch cutting swath with enough torque to handle thick crabgrass and overgrown edges. The brushless motor extends tool life and stays cooler during long sessions. At roughly 10 pounds with battery attached, it is on the heavier side, but the adjustable auxiliary handle gives good two-handed control. The bump-feed spool is reliable and easy to reload. This model shares battery compatibility with other DEWALT 60V tools, so existing DEWALT owners get extra value. Runtime clocks in around 45 minutes on the included 9Ah battery. A solid investment for anyone tackling a half-acre or more on a regular schedule.
EGO Power+ ST1521S — Best All-Around Cordless Pick
EGO has built a strong reputation in battery-powered outdoor tools, and the ST1521S earns it. The 56V 2.5Ah battery runs the 15-inch cutting path for about 35 minutes, enough for most suburban lots in one charge. The carbon fiber straight shaft reduces vibration and keeps weight manageable at 7.5 pounds. Line advance is automatic, which means fewer stops to bump-feed during a session. The unit converts to an edger with a 90-degree head rotation, making it a two-in-one tool for people who want clean sidewalk borders. Compatible with the broader EGO 56V battery system if you already own EGO gear.
Greenworks 21362 — Best Quiet Option
The Greenworks 21362 is a corded 13-amp model that never runs out of power as long as the extension cord reaches. The 15-inch cutting swath handles grass and light weeds efficiently, and the dual-line feed cuts more aggressively than single-line designs. Because it is electric, noise is significantly lower than gas equivalents, making it a good pick for noise-sensitive neighborhoods or early-morning sessions. No battery to manage or fuel to mix. The main limitation is cord management: a 100-foot heavy-duty extension cord is recommended for backyard use. Weight is just 6.7 pounds, making it one of the easier models to use for extended periods.
Husqvarna 128LD — Best Gas-Powered Pick
For heavy brush, slopes, and areas far from an outlet, gas still leads. The Husqvarna 128LD runs a 28cc engine with a detachable straight shaft. The detach feature is key: you can swap in Husqvarna attachments like an edger, blower, or cultivator, turning one power head into a multi-tool system. Cutting diameter is 17 inches, giving it the widest path in this lineup. Startup is straightforward with the SmartStart system, and the T25 tap-advance trimmer head is industry-standard reliable. This is the model to reach for when the job involves more than trimming grass, including cutting back small saplings or clearing overgrown lots.
BLACK+DECKER LSTE525 — Best Budget Pick
The BLACK+DECKER LSTE525 is a 20V MAX cordless trimmer aimed at smaller properties and light maintenance. The 12-inch cutting swath and automatic feed spool make it approachable for first-time users. At under 5 pounds with battery, arm fatigue is minimal during short sessions. The two-speed switch conserves battery when working through thin grass and bumps up power for denser patches. Runtime is around 30 minutes on the included 2.0Ah battery. It is not a workhorse for heavy overgrowth, but for apartment patios, small lawns, and touch-up work between mows, it delivers solid performance at a budget-friendly price.
How to Choose a Weed Wacker
Start with yard size. Small lots under a quarter-acre do fine with a 20V or 40V cordless model. Larger properties benefit from higher-voltage batteries (56V+) or a gas engine for uninterrupted runtime. Shaft style matters too: curved shafts are lighter and easier to store, while straight shafts offer better reach under shrubs and transfer more power to the head. If you already own a battery platform from DEWALT, EGO, or Greenworks, buy into that same voltage to share batteries across tools. Finally, check the trimmer head: bump-feed is the standard, but automatic-feed models reduce interruptions during longer sessions.
For related guides, see our best cordless lawn mowers and best leaf blowers roundups. For details on how we evaluate outdoor power tools, visit our methodology page.
Frequently asked questions
What is the difference between a weed wacker and a string trimmer?+
They are the same tool. 'Weed wacker' is a brand nickname that became a common term. Both refer to handheld power tools that use a rotating nylon line to cut grass and weeds along edges, fences, and areas where mowers cannot reach. The terms are interchangeable in everyday use.
How long does a battery-powered weed wacker run on one charge?+
Most 40V cordless models deliver 30 to 45 minutes of runtime on a full charge, which covers a typical suburban yard. Higher-capacity 5Ah or 6Ah batteries can extend runtime to 60 minutes or more. Heavier, overgrown areas drain the battery faster than light maintenance trimming.