Cordless outdoor power tools have moved to the mainstream of property maintenance, and the string trimmer is often the first battery tool a homeowner or contractor buys. The second is usually a pole trimmer for hedges and high branches. Both look like simple machines, but the spec sheet decides how well they fit the work. Cutting width, line size, speed settings, weight, and reach all change the result. The same decisions apply across the yard, and comparing cordless chainsaws against trimmers shows how one battery platform now covers the whole property.
A trimmer is a seasonal tool for many owners, which makes the specification review more important, not less. A mistake in the store means a full season of fighting a tool that is too heavy, too narrow, or too slow. The points below turn that review into a checklist.
What Cutting Swath and Line Size Tell You
The cutting swath is the width of the area the trimmer clears in one pass. A 14-inch swath is the current standard for full-size cordless trimmers, up from the 13-inch swath common a generation earlier. The wider pass means fewer sweeps along a fence line and less time on the job. Line size matters just as much. A 0.080-inch line handles grass and light weeds, while heavier vegetation calls for a thicker line that resists snapping. The push toward higher voltage ratings in cordless outdoor tools traces back to the limits of older 18V-class batteries, and the story behind why manufacturers moved to 20V-class systems explains why today’s trimmers run longer without weighing more.
The width also affects edges. A 14-inch swath trims a wider band along a sidewalk, which means fewer passes and a straighter edge. A narrower head reaches between tight plantings where a wide head would scalp the bed. Contractors who move between properties often keep two heads or two trimmers for this reason.
Matching Line Size to the Vegetation
Light grass around a patio needs a thinner line and a lower speed. Thick grass and saplings at the back of a lot need the thickest line the head accepts. Read the spool marking before buying replacement line, and buy the recommended diameter instead of the cheapest bulk spool.
| Specification | Older generation | Current generation |
|---|---|---|
| Cutting swath | 13 inches | 14 inches |
| Line size | 0.065 to 0.080 inch | 0.080 inch standard |
| Weight without battery | 8.5 lb | 7.9 lb |
| Speed control | single speed | variable, 0 to 4600 or 0 to 6000 RPM |
Before you compare two trimmers, check the same five points on both:
- Cutting swath and the line size the head accepts
- Speed settings and whether the trigger is variable
- Weight with the battery installed, not without it
- Stored length, folded or straight
- Battery compatibility with the tools you already own
Power, Speed Settings, and Runtime
Brushless motors have become the default in cordless outdoor tools because they convert more of the battery’s energy into cutting work. A brushless trimmer offers two speed settings, typically 0 to 4600 and 0 to 6000 RPM, with a variable speed trigger in between. Lower speed preserves runtime for long edges, and higher speed cuts through heavy growth. The same motor technology shows up across the yard; reviews of high voltage cordless blowers demonstrate how brushless designs changed expectations for runtime and noise in outdoor equipment.
Runtime Math
Runtime depends on the pack. A 5.0 Ah battery on the low speed setting can run a string trimmer for roughly 30 to 45 minutes of continuous trimming, and noticeably less on high speed. Buy the kit version with the larger battery if a typical session outlasts one pack.
Speed settings also act as a runtime control. Trimming at 4600 RPM instead of 6000 can extend a charge by 20 to 30 percent on the same swath of grass. The variable trigger lets an operator drop to the minimum speed for light touch-up work and pull full speed only when the head meets heavy growth.
| Setting | Speed range | Best use |
|---|---|---|
| Low | 0 to 4600 RPM | Grass along edges, light trimming, longest runtime |
| High | 0 to 6000 RPM | Thick grass, weeds, fence lines |
| Variable trigger | anywhere in the range | Fine control around beds and stones |
Weight, Balance, and Storage Design
Weight without the battery has dropped across generations, with one recent trimmer coming in at 7.9 pounds compared to 8.5 pounds for the model it replaced. A pound sounds small, but held at arm’s length along a fence line it is the difference between finishing the job and stopping early. The move from heavy brushed motors to compact brushless units is one of the changes manufacturers engineered into the cordless revolution, and lighter heads are the visible result.
The Hinged Shaft Question
A hinged shaft lets the trimmer fold in half for storage. The folded package fits in a car trunk or a narrow garage gap where a straight shaft will not. Pole trimmers rarely fold, which matters when you choose where to store a 7-foot tool for months between uses.
Balance matters in a different way. A trimmer that hangs nose-heavy fights the operator on every pass, while a well-balanced unit pivots naturally at the hip. Check the balance point with the battery installed, because the pack shifts the center of gravity. A tool that feels right in the store for two minutes will feel right after two hours.
Serviceability matters for commercial use. A trimmer used daily needs a line spool that loads without tools, a head that survives curb contact, and guards that do not rattle loose. Check the spool design before you buy, because the fastest trimmer on paper is slow when reloading the line takes ten minutes.
Pole Trimmers: Reach and Articulation
A pole hedge trimmer trades portability for reach. A 22-inch cutting head on an extending pole reaches up to 12 feet, which clears the top of a fence line or a tall hedge without a ladder. The head articulates through multiple positions, commonly seven stops across a 180-degree range, so the blade angles down at hedges and up at undersides. Branches thicker than about 1 inch need a pole chainsaw instead, and the same battery that runs the trimmer runs the saw. The expansion of cordless yard equipment follows the pattern set by cordless lawn mowers, where one battery platform now covers cutting, trimming, and blowing.
Articulating Head Positions
Seven head positions cover flat trimming, vertical cuts, and overhead work. Set the angle before lifting the tool, and use the lower positions for precision work close to the ground. An articulated head also cuts the underside of a hedge flat, which a fixed head cannot do without flipping the whole tool.
Reach claims deserve a skeptical read. A pole rated at 7 feet extended with a 12-foot total reach assumes the operator’s arms are fully extended and the head is angled. Measure the actual height of your hedges and compare against the reach with the pole at a comfortable working angle, not the maximum advertised number.
Battery Compatibility and Yard Tool Planning
The strongest argument for staying on one platform is battery sharing. The 5.0 Ah pack that runs the trimmer also powers a blower, a chainsaw, or a pole saw, and the 4.0 Ah pack in the hedge trimmer kit fits any tool on the same system. Comparing battery powered lawn tools side by side shows why a crew that standardizes on one platform carries fewer packs and chargers overall.
Kit pricing reflects the battery value: a string trimmer kit with a 5.0 Ah pack lists near $199, while the bare tool sells for about $129. The hedge trimmer kit with a 4.0 Ah pack lists near $219, with a $149 bare tool. If you already own packs, buy bare tools and spend the difference on another battery. For a first purchase, the kit is usually the better entry because it guarantees a compatible charger and pack.
Matching the Tool to the Property
Property size and vegetation type should drive the purchase, not the color of the tool. A small lot with light grass gets by with a smaller swath and a single battery. A large property with fence lines and outbuildings justifies the wider swath, the high speed setting, and a second battery. Contractors running multiple properties in one day need the kit with the larger pack plus a spare. Working through selection criteria for cordless string trimmers and blowers property by property prevents the most common mistake, which is buying a trimmer rated for light work and running it through heavy growth.
Measure the property before you shop:
- Measure the tallest hedge and the highest branch you trim.
- Note the thickest branch that must be cut in a season.
- Time the longest edge-trimming session of the year.
- Compare those three numbers against the swath, reach, and battery size on the spec sheet.
The right tool matches the work. A trimmer that fits the property cuts the job short, and a battery system shared with the rest of the yard keeps every tool ready when the grass is.