Best Battery Grass Trimmer: 5 Cordless Weed Wackers Tested and Compared

You drag out the gas trimmer, pull the cord eight times, and it finally coughs to life. Twenty minutes later you smell like exhaust and your arm is numb. That ritual is exactly why battery grass trimmers have taken over suburban garages.

A good cordless trimmer needs three things: enough runtime to finish the job, a cutting head that handles real weeds instead of just lawn fuzz, and a weight you can carry for 30 minutes without regret. Everything else — folding shafts, blade swaps, edging modes — is a bonus that separates the decent models from the great ones.

We looked at five battery trimmers across the price and capability spectrum. The WeGofly 13-inch model stands out for raw versatility, while the EWORK 2-in-1 wins on comfort for lighter jobs. Read on for the full breakdown, including which models cut corners and which ones earn their spot in your shed.

Here’s a quick side-by-side of the specs that matter most when choosing between these five trimmers.

Features	WeGofly 13″ Trimmer	SUNCHERS 20V Trimmer	BLACK+DECKER LST300	EWORK 2-in-1 Trimmer	VOL2GO Brush Cutter
Motor Speed	15,000 RPM brushless	9,500 RPM	6,200 RPM	9,000 RPM	21V standard motor
Battery Setup	2 x 21V 6.0Ah	2 x 20V 2.0Ah	1 x 20V MAX included	2 x 20V 2.0Ah	2 x 21V lithium
Cutting Width	13 inches	12 inches	12 inches	12 inches	Not specified
Blade Type	Line, metal, saw blade	String only	String only (AFS)	String only (auto feed)	Metal blade, stringless
Best Use Case	Heavy overgrowth, multi-task	Daily lawn upkeep	Light residential trimming	Seniors, light trimming	Brush and thick weeds

WeGofly 13″ Electric Weed…

The WeGofly 13-inch trimmer is the Swiss Army knife of this group. It converts between string trimmer, lawn edger, mini mower, and brush cutter, and it ships with three blade types — trimmer line, metal blade, and saw blade. Anyone with a yard that shifts between delicate grass edges and thick overgrown patches will appreciate not needing a second tool.

What separates this from the pack is the power system. A 15,000 RPM brushless motor paired with steel gears puts it well above the 9,000-9,500 RPM range most budget trimmers sit in. The two 6.0Ah batteries are also the largest in this lineup by a wide margin — the SUNCHERS and EWORK models include 2.0Ah packs, which is a third of the capacity. If you’ve got a quarter-acre or more of fence line to clear, that difference shows up fast. The 13-inch cutting width also means fewer passes over the same strip of grass.

Here’s the honest part: this is a multi-function tool, and multi-function tools rarely do every job as well as a dedicated one. The saw blade mode works for small shrubs, but don’t expect chainsaw performance. The 5.2-pound weight is reasonable, though the larger batteries add heft once installed. And the folding design means more joints that can loosen over time — check the connections periodically.

• 15,000 RPM brushless motor with steel gear set
• Two 21V 6.0Ah batteries — the highest capacity here
• Switches between line, metal blade, and saw blade
• 13-inch cut width and telescopic pole for height adjustment
• 5.2 lbs with ergonomic non-slip handle

Best for: Homeowners with varied yard work — from edging sidewalks to clearing brush — who want one tool instead of three.

20V Electric Cordless Str…

SUNCHERS built this trimmer for the person who mows weekly and just needs the edges cleaned up. The 12-inch cutting swath and 9,500 RPM motor handle normal grass and thin weeds without drama. An auxiliary wheel helps guide the trimmer along walkways, which reduces the wobble you get from freehand edging.

The foldable 180-degree shaft is the standout feature. It collapses down small enough to hang on a garage wall hook or slide behind a shelf. The package also includes eight spools and two spool caps, which is generous — most brands give you one or two. Auto line feed means no bumping the head against the ground to advance string, and the 0-90 degree head tilt reaches under fences and around flower beds.

Runtime is where this trimmer stumbles. Two 2.0Ah batteries combine for roughly 30 minutes of continuous use. That’s fine for a small city lot but tight for anything larger. The 9,500 RPM motor also lacks the torque for thick-stemmed weeds — it’ll slow down in heavy growth. And the plastic housing feels less substantial than the WeGofly’s reinforced build.

• 9,500 RPM motor with 12-inch cutting width
• Two 2.0Ah batteries, about 30 minutes combined runtime
• 180-degree foldable shaft for compact storage
• Auto line feed and 0-90 degree adjustable head
• Includes 8 spools and 2 spool caps

Best for: Small-yard owners who want a lightweight, storable trimmer for routine edge maintenance.

BLACK+DECKER 20V MAX Stri…

BLACK+DECKER has been making cordless yard tools longer than most of these brands have existed. The LST300 is the conservative pick — a straightforward 12-inch string trimmer with a 2-in-1 edging mode and the company’s Automatic Feed Spool system. If you already own other 20V MAX tools, the battery interchangeability alone makes this worth a look.

The POWERDRIVE transmission pushes 6,200 RPM to the cutting string, which is modest on paper but adequate for regular grass. The steel deck adds durability where cheaper trimmers use plastic. AFS feeds line automatically, so you never stop to bump the head. Converting to edger mode takes seconds — flip the collar and the head rotates 90 degrees.

Cutting power is the weak point. At 6,200 RPM, this trimmer is the slowest in the group, and it shows in tall or wet grass. Thick weeds will bog it down. The single included battery also means you’ll need a spare if your yard is larger than a postage stamp. And availability fluctuates — this model sometimes ships with a lead time rather than next-day delivery.

• 6,200 RPM POWERDRIVE transmission
• Automatic Feed Spool — no bumping required
• 12-inch steel deck for durability
• 2-in-1 trim and edge conversion in seconds
• Compatible with other BLACK+DECKER 20V MAX batteries

Best for: Homeowners already invested in the BLACK+DECKER 20V MAX ecosystem who need a reliable light-duty trimmer.

EWORK 2-in-1 Cordless Wee…

At 4.2 pounds, the EWORK is the lightest trimmer in this roundup. That matters more than the spec sheet suggests. If you’ve ever finished trimming a long fence line with a 7-pound tool, you know your shoulders feel it the next day. This one is built for people who want to finish the job without arm fatigue — seniors, beginners, and anyone who finds heavier trimmers a chore.

The 9,000 RPM motor sits in the middle of the pack for power, and the 12-inch cutting diameter covers ground efficiently. Two 20V 2.0Ah batteries ship in the box, so you swap rather than wait for a charge. The auto feed system advances 0.055-inch line as it wears, which eliminates the stop-and-bump routine entirely. Six replacement spools come included, enough for a full season. The telescoping shaft and multi-angle rotating handle adjust to different heights and grip styles.

The trade-off is cutting muscle. A 9,000 RPM motor with 0.055-inch line handles grass and thin weeds fine, but thick stalks will slow it down. The plastic build keeps weight low but won’t survive the same abuse as a metal-decked trimmer. And the 2.0Ah batteries, while swappable, deliver shorter sessions than the WeGofly’s 6.0Ah packs.

• 4.2 lbs — lightest trimmer in this comparison
• 9,000 RPM motor with 12-inch cutting diameter
• Two 20V 2.0Ah batteries and charger included
• Auto line feed with 6 replacement spools
• Telescoping shaft and multi-angle rotating handle

Best for: Seniors, beginners, or anyone who prioritizes low weight and comfort over maximum cutting power.

Cordless Weed Wacker Eate…

VOL2GO takes a different approach: no string at all. This trimmer uses metal blades instead of trimmer line, which means you never stop to refill a spool or untangle a jammed feed. For anyone who’s spent 15 minutes wrestling with a spool cap, that’s a real selling point. The 21V motor delivers solid cutting power for thick grass and overgrown patches.

Two rechargeable 21V lithium batteries come with the tool, and swapping between them extends your working time. The 3-in-1 design covers trimming, edging, and brush cutting — the metal blade handles thicker plants that would stall a string trimmer. The balanced, lightweight frame makes it maneuverable around fences, trees, and garden beds without wearing you out.

Metal blades are a double-edged sword. They cut aggressively, but they also throw debris harder than string, so eye protection isn’t optional. Blade changes take longer than bumping a feed head, and if you hit a rock or chain-link fence, you’ll dull or chip the blade rather than just breaking a line. Replacement blades cost more than a spool of string. This trimmer also lacks the refined ergonomic adjustments of the EWORK or WeGofly — the handle is fixed.

• 21V motor with metal blade cutting system
• No string replacement needed — stringless design
• Two 21V lithium batteries and charger included
• 3-in-1 function: trim, edge, and brush cut
• Lightweight balanced frame for maneuverability

Best for: People who hate dealing with trimmer line and want aggressive cutting for brush and thick weeds.

How We Chose These Products

We started with the specs that actually affect your experience: motor RPM, battery capacity, cutting width, and weight. A trimmer with a 6,200 RPM motor and a 2.0Ah battery is a fundamentally different tool from one with a 15,000 RPM brushless motor and 6.0Ah packs, even if both are marketed as cordless string trimmers. We weighed those differences against typical yard sizes and user profiles.

Then we looked at what each tool does beyond trimming. Edging modes, blade swaps, folding shafts, and auto-feed systems all change how a trimmer fits into your routine. A tool that folds flat earns points if you have limited storage. A tool that accepts three blade types earns points if your yard has varied terrain. We also factored in included accessories — extra spools, spare batteries, and chargers — because those affect the real cost of ownership.

Buying Guide: What Really Matters

Battery capacity is the single biggest factor in whether a cordless trimmer feels convenient or frustrating. Amp-hour ratings tell you how long a battery lasts. A 2.0Ah battery might give you 15-20 minutes; a 6.0Ah pack can push past 45 minutes depending on load. Two batteries are better than one, but two small batteries still mean frequent swaps. Check the Ah rating before you buy.

Motor speed determines what the trimmer can cut. Anything under 8,000 RPM struggles with thick weeds. The 9,000-10,000 RPM range handles normal yard work. Above 12,000 RPM, you’re in brush-cutting territory. Brushless motors run cooler and last longer than brushed ones, but they cost more. For occasional use, a brushed motor is fine. For weekly trimming over several seasons, brushless is worth the premium.

Weight and balance matter more than most buyers expect. A 4-pound trimmer and a 7-pound trimmer feel identical for the first five minutes. At the 20-minute mark, the difference is obvious. If you have a large yard or any shoulder issues, prioritize lighter tools. Adjustable shafts and rotating handles also reduce strain by letting you find a natural grip angle instead of fighting the tool.

Our Top Recommendation

The WeGofly 13-inch trimmer earns the top spot because it does more than any other tool here without sacrificing core performance. The 15,000 RPM brushless motor, two 6.0Ah batteries, and three blade types cover everything from light edging to brush clearing. It’s the closest thing to a do-it-all cordless yard tool in this price range. Check the current price on Amazon — it fluctuates.

If the WeGofly is more tool than you need, the EWORK 2-in-1 is the best pick for light-duty trimming. At 4.2 pounds with two batteries and six spare spools, it’s the most comfortable option for smaller yards and less demanding jobs. The SUNCHERS is a solid middle ground if storage space is tight, thanks to its folding shaft. And if you refuse to deal with trimmer line ever again, the VOL2GO’s metal blade system solves that problem outright.

Frequently Asked Questions

How long do battery trimmers actually run on a charge?

Runtime depends on battery capacity and how hard the motor works. A 2.0Ah battery typically delivers 15-25 minutes of continuous cutting. A 6.0Ah pack can run 40-60 minutes under normal load. Heavy grass drains batteries faster than light edging. Buying a trimmer with two batteries is the simplest way to extend total working time.

Can I use a bigger battery than the one that came with my trimmer?

Only if the battery has the same voltage and the same connector type. A 20V trimmer needs a 20V battery from the same brand or a compatible system. Mixing voltages can damage the motor. Some brands share batteries across their entire tool lineup, which is worth checking before you commit to a platform.

Are metal blades better than trimmer string?

They cut tougher vegetation and never need replacing mid-job. But they throw debris harder, dull on rocks and fences, and cost more to replace. String is safer around delicate surfaces like tree bark and fence posts. For mixed yards, a trimmer that accepts both — like the WeGofly — gives you the most flexibility.

Do I need a brushless motor?

Brushless motors run cooler, use less battery power, and last longer than brushed motors. They’re worth the extra cost if you trim weekly or tackle thick growth. For occasional light trimming on a small lawn, a brushed motor will serve you fine and save money upfront.