Key takeaways
- Small yard, under about a quarter acre: a compact battery trimmer with a 13 to 15 inch cutting swath and a 2 to 4 amp-hour battery is typically enough.
- Medium yard, up to about half an acre: a 15 to 16 inch battery trimmer with a larger battery, or a lightweight gas model. The Mowers Guide suggests 14 to 16 inch battery trimmers for lots under half an acre.
- Large property or heavy weeds: a gas trimmer or a high-capacity battery pro model with spare batteries.
For most homeowners with a lot under half an acre, a battery string trimmer such as the EGO Power+ or Milwaukee M18 Fuel is the easiest choice, while larger properties and thick brush still suit gas models like the Echo SRM-225i or Stihl FS series. The right trimmer depends on yard size, how often you cut, the battery platform you already own, and how much weight and noise you will tolerate. This guide compares the main current options, explains what makers state about them, and lists the trade-offs by budget tier.
Our top picks
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String trimmers at a glance
| Model | Type | Best for | Notes from makers and reviewers |
|---|---|---|---|
| Milwaukee M18 Fuel string trimmer | Battery | Owners of M18 tools | Bob Vila’s testing named a Milwaukee kit best overall among battery trimmers |
| EGO Power+ (ST1511T, ST1521S and related) | Battery | Homeowners who want easy line loading | Pro Tool Reviews calls the PowerLoad design among the best on the market; EGO attachments work across its own platform only |
| Stihl FSA 80 R / FSA 135 R | Battery | Users who want a dealer-backed pro brand | Bob Vila lists the FSA 80 R as an upgrade pick; Pro Tool Reviews included the FSA 135 R in a professional shootout |
| Echo eForce 56V and DSRM-2600 | Battery | Larger yards with battery preference | Named for large yards by Bob Vila; DSRM-2600 featured in a pro shootout |
| Husqvarna 525iLST | Battery | Pro-style battery use with attachment options | Included in Pro Tool Reviews’ head-to-head |
| Echo SRM-225i | Gas | Reliable gas power for homeowners | Named best overall gas trimmer by Bob Vila |
| Husqvarna 330LK | Gas | Interchangeable attachments | Named runner-up in the same gas roundup |
| Stihl FS 40 C-E | Gas | Light weight and easy starting | Named best lightweight gas model |
Battery or gas
Battery trimmers have closed much of the performance gap. Consumer Reports states that the best battery models cut as well as the best gas tools, and several reviewers prefer them for light weight, easy starting and low maintenance. They are quieter, need no fuel mixing, and can be stored in a garage without fuel concerns. The limits are runtime, battery cost, and reduced power under heavy load when the battery runs low.
Gas trimmers still make sense for acreage, dense weeds, brush blades and all-day use. They run until the tank is empty and refuel in a minute. They require correct fuel mixing for two-stroke models (or straight fuel for four-stroke designs), carburetor care, spark plug and air filter replacement, and they produce more noise and vibration. Follow the maker’s fuel ratio and storage advice exactly.
Size and yard guidelines
- Small yard, under about a quarter acre: a compact battery trimmer with a 13 to 15 inch cutting swath and a 2 to 4 amp-hour battery is typically enough.
- Medium yard, up to about half an acre: a 15 to 16 inch battery trimmer with a larger battery, or a lightweight gas model. The Mowers Guide suggests 14 to 16 inch battery trimmers for lots under half an acre.
- Large property or heavy weeds: a gas trimmer or a high-capacity battery pro model with spare batteries.
Features worth comparing
Shaft design: straight or curved
Straight shafts reach under shrubs and decks and suit taller users. Curved shafts are lighter and easier to maneuver for shorter users or for general lawn edging. Many battery models are straight, and some offer telescoping shafts.
Line feed and loading
Bump-feed heads are common, while automatic and quick-load systems reduce time spent reloading. EGO’s PowerLoad and Echo’s speed-feed heads are often praised for fast reloads. If you hate rewinding line, favor a model with a tool-free loading design.
Attachment compatibility
Some trimmers accept edgers, pole saws, cultivators and hedge trimmers on the same power head. Pro Tool Reviews warns that multi-head systems from EGO, Milwaukee and Stihl are not compatible with other brands, so consider the attachments you might want later before choosing a platform.
Battery platform
If you already own batteries from Milwaukee, EGO, Makita, DeWalt or another maker, buying a bare tool for the same platform usually saves money and storage space. If you do not, compare battery capacity, charger speed and how many other outdoor tools the platform offers.
Weight and balance
A trimmer used for 30 minutes feels different from one used for three hours. Pay attention to the maker’s stated weight, harness options and how the battery sits on the shaft. Rear-mounted batteries often balance a longer shaft better.
Budget tiers
| Tier | What you get | Trade-offs |
|---|---|---|
| Budget | Entry battery kits or small gas models, basic bump feed, limited runtime | Less power on thick weeds, smaller batteries, fewer attachments |
| Mid-range | Brushless battery models from EGO, Milwaukee, Makita or Ryobi; homeowner gas models | Good balance of power and weight; battery platform lock-in |
| Premium | Stihl, Echo, Husqvarna pro-grade battery and gas models, dealer service | Higher purchase cost; may exceed what a small lawn needs |
Pick the right one
| Pick this if you | Consider | Reason |
|---|---|---|
| Already own Milwaukee M18 batteries | Milwaukee M18 Fuel trimmer | Shares batteries and was named best overall battery by Bob Vila |
| Hate reloading line | EGO PowerLoad model | Reviewers praise the loading design |
| Want pro dealer support | Stihl or Echo battery | Established service networks |
| Have more than half an acre or thick weeds | Echo SRM-225i or Husqvarna 330LK | Gas runtime and power |
| Need a light, easy-start gas unit | Stihl FS 40 C-E | Named best lightweight gas pick |
| Want attachments | Husqvarna, EGO, Stihl or Echo multi-tool systems | Power heads accept several tools, within the same brand |
Safety and care
Wear eye protection, closed shoes and long trousers when trimming, and use hearing protection with gas models. Clear stones and debris from the work area first, since thrown objects are a main hazard. Keep bystanders and pets away. Disconnect the battery or stop the engine before changing line or clearing tangles. Use the line diameter listed in the manual, since heavier line can overload the motor.
Clean grass from the guard and head after each use, store batteries away from extreme heat and freezing temperatures, and follow the maker’s charging instructions. For gas models, drain or stabilize fuel before long storage periods and replace the air filter and spark plug at the intervals in the manual.
Alternatives
- Cordless string trimmer/edger combos: convert between trimming and edging with a head rotation.
- Brush cutters: use metal blades for saplings and thick brush; gas brush cutters are a better fit than standard line trimmers.
- Corded electric trimmers: low cost and light, but limited by cord length and outlet access.
- Wheeled string trimmers: useful for long edges and slopes where you want a steady cut height.
Buying checklist before you commit
Start with the size of the area you cut and how often. A trimmer used for ten minutes along a fence has different needs from one used on a whole property every weekend. Next, decide whether you already own batteries from a compatible platform, because that choice often outweighs small differences between trimmers. Then think about storage and weight, since a tool that is awkward to hang or carry tends to stay in the shed.
It also helps to read the maker’s own specification page for cutting swath, line diameter, battery voltage and stated weight, and to compare those figures across models. Independent reviewers such as Bob Vila and Pro Tool Reviews publish side-by-side results, but their test yards differ from yours, so treat their rankings as a guide rather than a guarantee. If a local dealer offers a demo, hold the tool with a battery attached and swing it for a minute to judge balance.
Common mistakes to avoid
- Buying the cheapest bare tool without checking that a battery and charger are included.
- Choosing a gas model for a tiny yard where starting and storage become a nuisance.
- Ignoring attachment compatibility and later finding the edger or pole saw does not fit.
- Using heavier line than the manual allows, which can overheat the motor.
- Letting grass wrap around the shaft and head, which strains bearings.
Frequently Asked Questions
Are battery string trimmers powerful enough to replace gas?
For most residential yards, yes. Consumer Reports says top battery models cut as well as top gas tools. Heavy brush, very large properties and all-day use still favor gas or multiple spare batteries.
How big a battery do I need?
Small yards often work with a 2 to 4 amp-hour battery. Medium yards usually benefit from a larger pack, and a second battery avoids waiting on the charger. Check the maker’s runtime figures, which depend on load.
Can I use any brand’s attachments on my trimmer?
Generally no. Pro Tool Reviews notes that EGO, Milwaukee and Stihl multi-head systems do not interchange with other brands. Stay within one brand’s attachment lineup.
What line size should I use?
Use the diameter printed in the manual or on the head. Heavier line can strain the motor, while thinner line wears quickly on tough weeds.
Which is better for a small yard, straight or curved shaft?
Curved shafts are lighter and easier for short users, while straight shafts reach under shrubs. Try both in a store if possible.
Do gas trimmers need special fuel?
Two-stroke models need a fuel and oil mix in the ratio the maker specifies, while four-stroke designs may use straight fuel. Always follow the manual and use fresh fuel.
