Head-to-head · Best String Trimmers

EGO Power+ ST1623T 16-Inch Line IQ 56V vs Ryobi RY402110 40V HP Brushless 17-Inch Carbon Fiber

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

EGO Power+ ST1623T 16-Inch Line IQ 56V comes out ahead by a narrow margin (4.7 vs 4.4). The gap is mostly about Suburban homeowners with 1/4 to 1 acre who want gas-class power, hate refueling, and don't mind a heavier tool for the convenience of auto line feed. — read the strengths below before deciding.

Higher ratedRanked #1 in Best String Trimmers

EGO Power+ ST1623T 16-Inch Line IQ 56V

4.7

$329

The EGO Power+ ST1623T pairs a brushless 56V motor with auto-feeding Line IQ and the brand's POWERLOAD spool, so most owners go a full season without ever touching the head. Pro Tool Reviews ran it for over an hour on a single 4.0Ah pack and scored it 9.7/10. The trade-offs are a 12.6 lb working weight and a price north of $300, but for a homeowner who wants gas-class performance without the maintenance, no other cordless trimmer sweats this combination of cutting width, ergonomics, and warranty.

Strengths

— 16-inch swath with Line IQ auto-feed eliminates the bump-feed dance
— POWERLOAD spool reload takes under 30 seconds with the included pre-cut line
— Telescopic carbon-fiber shaft carries a lifetime warranty

Watch-outs

— 12.6 lb working weight is on the heavy end of cordless picks
— Line IQ can shed string faster than it feeds when trimming hard fence lines
— Recharge time stretches to roughly 70 minutes on the standard 320W charger

$329 · Check Price on Amazon Full review →

Ranked #3 in Best String Trimmers

Ryobi RY402110 40V HP Brushless 17-Inch Carbon Fiber

4.4

$299

Ryobi's flagship 40V HP Brushless string trimmer in the Whisper Series gives you the closest cordless approximation to a 30cc gas trimmer most homeowners will find under $300. Pro Tool Reviews scored it 9.4/10 and called out over an hour of runtime on the 6.0Ah pack. The trade-off is size — at 72 inches and nearly 13 lb with battery, it's a commitment — but for buyers who want adjustable 15-to-17-inch cut width and the ability to drop in 0.105-inch line for tougher growth, the Ryobi is the sharpest mid-tier value in the cordless segment.

Strengths

— Brushless motor delivers gas-equivalent power roughly matching a 30cc 2-stroke
— Cutting width adjustable from 15 to 17 inches for fast cleanup of large lots
— Carbon-fiber shaft keeps total weight under 13 lb with the 6.0Ah battery

Watch-outs

— Bare tool weight is still close to 9 lb, heavier than smaller-class cordless
— 72-inch overall length can be unwieldy for shorter users
— Higher line draw with the 0.105-inch line option shortens runtime noticeably

$299 · Check Price on Amazon Full review →

How they stack up

EGO Power+ ST1623T 16-Inch Line IQ 56V

Outclasses the Worx WG170 GT Revolution on cutting width (16 in vs 12 in), runtime, and build, but you pay nearly triple. Sits below the Husqvarna 525L on raw cutting torque in heavy weeds but matches it on noise, fumes, and warm-up time.

Ryobi RY402110 40V HP Brushless 17-Inch Carbon Fiber

Slightly outpowers the EGO ST1623T on raw cutting throughput thanks to the 0.105-inch line option, but loses the auto-feed and POWERLOAD spool ease. Far more capable than the Worx WG170 GT Revolution on large or weedy lots, with three times the runtime and a real metal-bodied head.

Specs side-by-side

Spec	EGO Power+ ST1623T 16-Inch Line IQ 56V	Ryobi RY402110 40V HP Brushless 17-Inch Carbon Fiber
Power Source	56V battery (4.0Ah included)	40V battery (6.0Ah included)
Cutting Width	16 in	15-17 in (adjustable)
Line Diameter	0.095 in	0.095-0.105 in
Runtime	Up to 60 min	Up to 67 min
Shaft	Telescopic carbon fiber	Straight carbon fiber
Weight (with battery)	12.6 lb	12.9 lb
Line Feed	Line IQ auto-feed + POWERLOAD	REEL EASY+ 3-in-1 bump-feed
Warranty	5-year tool, 3-year battery, lifetime shaft	5-year tool, 3-year battery

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