15 Best String Trimmers with 4.0 Ah, Compared
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
Finding the best string trimmers with 4 0 ah requires comparing key specifications across multiple platforms. We analyzed 15 models to identify the top performers based on published listing data. The EGO Power+ 56V 16-Inch String Trimmer and Edger leads the list because its 16-inch cutting width offers broad coverage for versatile trimming and edging tasks. Each selection reflects specific attributes like voltage, weight, and battery capacity found in the product details. This guide helps you decide which tool matches your yard size and power needs.
Quick picks
The best fit for you
- You want a versatile tool for trimming and edging EGO Power+ 56V 16-Inch String Trimmer and Edger This model includes a dedicated edging function alongside its 16-inch cutting width.
- You need a lightweight option for easy handling Husqvarna 16-Inch Dual-Direction Trimmer It weighs only 7 pounds, making it the lightest trimmer on this list.
- You want a brushless motor for long runtime Makita 18V Brushless 13-Inch String Trimmer The brushless motor offers dual-speed selection and up to an hour of runtime.
Our 15 picks
EGO Power+ 56V 16-Inch String Trimmer and Edger
Best for: versatile multi-tool trimming and lawn edging
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 56V
- Cutting Swath
- 16 in.
- Motor Type
- brushless
- Shaft Type
- carbon fiber
- Line Feed System
- POWERLOAD
View on Amazon: EGO Power+ 56V 16-Inch String Trimmer and Edger
This multi-head kit pairs a 56V power head with a 16-inch string trimmer and an 8-inch edger attachment. Powered by an included 4.0 Ah ARC Lithium battery, it delivers up to 45 minutes of trimming runtime or 75 minutes of edging. Brushless power, push-button line loading, and carbon fiber shafts make this package a solid choice if you need versatile trimming and clean border work in one modular system.
Pros
- Includes both 16-inch trimmer and 8-inch edger attachments
- Up to 45 minutes of trimming runtime with the 4.0 Ah 56V battery
- Push-button POWERLOAD system replaces trimmer line quickly
- Durable carbon fiber shafts backed by a lifetime warranty
- IPX4 weather-resistant build with high-efficiency brushless motor
Cons
- Requires swapping physical attachment shafts to switch between trimming and edging
- Other compatible multi-head tools like the cultivator and brush cutter must be bought separately
Good fit if
- You want a modular system that handles both 16-inch wide trimming and dedicated 8-inch lawn edging.
- You need push-button line reloading to avoid winding trimmer line manually.
- You want up to 45 minutes of cordless trimming runtime from a single 56V 4.0 Ah battery charge.
Skip if
- You prefer a single dedicated tool rather than swapping and storing modular attachment heads.
- You only need a basic, compact trimmer for light grass touch-ups.
Verdict: EGO Power+ 56V 16-Inch String Trimmer and Edger combines broad cutting coverage and dedicated edging on a modular 56V platform. Its carbon fiber construction, push-button line feeding, and 45-minute battery life give you heavy-duty performance across multiple yard tasks.
Greenworks 60V 16-Inch String Trimmer
Best for: medium to large yards needing attachment versatility
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 60V
- Cutting Swath
- 16 in
- Motor Type
- brushless
- Line Feed System
- Load N' Go
- Cutting Width
- 16-Inch
This cordless string trimmer combines a 60V brushless motor with a 16-inch cutting path. It includes a 4.0 Ah battery, a charger, and a Load N' Go trimmer head. The shaft accepts compatible attachments, letting you swap tool heads for other yard jobs. An included shoulder strap helps support its 18.7-pound weight. It suits you if you need a wide cutting swath and high voltage for clearing medium to large yards.
Pros
- Wide 16-inch cutting path
- Brushless motor running on 60V power
- Attachment-capable shaft connects to compatible tools
- Load N' Go head enables fast line reloading
- Comes with an adjustable shoulder strap
Cons
- Heavy total weight at 18.7 pounds
- Long 68.5-inch overall frame requires ample storage space
Good fit if
- You want a wide 16-inch cutting swath paired with high voltage.
- You plan to expand your yard tools using attachment-capable shafts.
- You already use or plan to use Greenworks 60V platform equipment.
Skip if
- You need a lightweight trimmer under 18 pounds.
- You have tight storage space unable to fit a 68.5-inch shaft.
Verdict: Greenworks 60V 16-Inch String Trimmer delivers high-voltage power and attachment flexibility for demanding trimming tasks. The broad cut saves time, though you must accommodate its 18.7-pound weight.
Greenworks 60V 13-Inch Trimmer 3-Tool Combo
Best for: complete 60V multi-tool yard care
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 60V
- Cutting Swath
- 13 in
- Power Source
- battery
- Line Feed System
- bump feed
- Cutting Width
- 13-Inch
This package centers on a 60V cordless system that pairs a 13-inch string trimmer with a 21-inch push mower and a leaf blower. For string trimming, it uses a dual-line bump feed head with .080-inch line powered by included 4.0 Ah and 5.0 Ah batteries. It suits you if you want a multi-tool setup with shared high-voltage batteries for your entire lawn routine.
Pros
- Includes both 4.0 Ah and 5.0 Ah 60V batteries
- Dual-line bump feed head handles .080-inch line
- Comes with a 21-inch push lawn mower and a leaf blower
- Four-year warranty on both tools and batteries
Cons
- 13-inch cutting swath is smaller than many dedicated 60V trimmers
- Includes extra equipment you must store if you only need a trimmer
Good fit if
- You want a 60V trimmer alongside a matching lawn mower and leaf blower.
- You want both 4.0 Ah and 5.0 Ah battery packs in one kit.
Skip if
- You only need a replacement trimmer and do not want a mower or blower.
- You want a wider cutting path than 13 inches for thick grass.
Verdict: Greenworks 60V 13-Inch Trimmer 3-Tool Combo equips your yard routine with multiple 60V batteries and a dual-line trimmer, mower, and blower. It delivers heavy-duty battery capacity across an entire suite of matching equipment.
EGO Power+ 16-Inch Carbon Fiber String Trimmer
Best for: hands-free line feeding and wide cutting paths
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 56V
- Cutting Swath
- 16 in.
- Shaft Type
- telescopic carbon fiber
- Line Feed System
- POWERLOAD, LINE IQ
- Cutting Width
- 16-Inch
View on Amazon: EGO Power+ 16-Inch Carbon Fiber String Trimmer
This cordless string trimmer pairs a 56V battery system with a 16-inch cutting width and a 4.0 Ah battery pack. It delivers up to 60 minutes of runtime per charge. The tool features an auto-sensing line feed system and a telescopic carbon fiber shaft that adjusts to your height. It suits you if you need wide-swath trimming without manual line bumping.
Pros
- Wide 16-inch cutting swath
- Up to 60 minutes of runtime on the 4.0 Ah battery
- Auto-sensing LINE IQ system feeds string without bumping
- Push-button POWERLOAD technology winds line automatically
- Telescopic carbon fiber shaft adjusts to user height
Cons
- Extra bundled battery ships in a separate package
- No multi-head attachment capability listed
Good fit if
- You want automatic line feeding without stopping to bump the head.
- You already use or want the EGO 56V ARC Lithium battery platform.
- You need an adjustable carbon fiber shaft tailored to your height.
Skip if
- You need an attachment-capable shaft to run multiple tool heads.
- You want all bundled batteries shipped together in one box.
Verdict: EGO Power+ 16-Inch 56V Telescopic String Trimmer provides automated line management and broad 16-inch coverage on a 56V platform. Its push-button reloading and telescoping shaft keep trimming tasks efficient.
WORX 15-Inch Brushless 40V String Trimmer
Best for: wide 15-inch trimming on 40V power
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 40V
- Cutting Swath
- 15 in
- Motor Type
- brushless
- Line Feed System
- bump feed
- Cutting Width
- 15-Inch
The Worx 40V 15-Inch Brushless String Trimmer pairs a 15-inch cutting swath with a 4.0 Ah Power Share battery system. It uses a brushless motor, variable speed control, and dual-exit 0.095-inch line to clear thick grass. At 9.42 pounds, it gives you a balance between reach and handling. This tool suits you if you need a wider cutting path than standard 13-inch models while staying on a 40-volt battery platform.
Pros
- 15-inch cutting diameter with dual-exit 0.095-inch line
- Brushless motor with variable speed throttle
- 40V power platform utilizing 4.0 Ah Power Share batteries
- Easy-load spool head with bump line advancement
Cons
- Total weight of 9.42 pounds is heavier than compact 20V trimmers
- Overall length of 68.3 inches without listed telescoping adjustment
Good fit if
- You want a 15-inch cutting swath paired with thick 0.095-inch line.
- You already use or plan to use Worx Power Share tools.
- You need variable speed control to balance motor output and runtime.
Skip if
- You want an ultra-light trimmer weighing well under nine pounds.
- You prefer an automatic line feed system over manual bump-feed.
Verdict: Worx 40V 15-Inch Brushless String Trimmer provides a wide 15-inch cut and dual 0.095-inch line for demanding yard cleanup. It delivers steady 40-volt power for properties requiring more coverage than smaller compact trimmers.
BLACK+DECKER 12-Inch 20V Max 3-in-1 Trimmer
Best for: small lawns needing versatile 3-in-1 maintenance
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 20V MAX
- Cutting Swath
- 12 in
- Power Source
- battery
- Cutting Width
- 12-Inch
- Mowing Function
- 3-in-1
This BLACK+DECKER tool functions as a string trimmer, edger, and mower deck in one setup. It runs on a 20V MAX power system and provides a 12-inch cutting swath. The kit includes two 4.0 Ah lithium-ion batteries to extend your work time. Featuring an adjustable height deck and pivoting handle, it suits you if you manage small lawns and want combined trimming and mowing options.
Pros
- Converts between trimmer, edger, and compact mower
- Includes two 20V MAX 4.0 Ah battery packs
- Adjustable height deck and pivoting handle
- Backed by a 2-year warranty
Cons
- 12-inch cutting swath is narrower than 13-inch to 16-inch models
- Takes 2.5 hours to reach a 60 percent battery charge
- 20V MAX platform offers lower voltage than 40V or 60V options
Good fit if
- You need a single tool that handles mowing, edging, and trimming.
- You want continuous run time supported by two included 4.0 Ah batteries.
- You prefer a compact 12-inch cut width for navigating tight areas.
Skip if
- You want a wider 15-inch or 16-inch cut path to finish open yards faster.
- You prefer a higher-voltage 40V or 60V tool system for heavier growth.
- You need rapid charging, since this pack reaches 60 percent in 2.5 hours.
Verdict: BLACK+DECKER 12-Inch 3-in-1 String Trimmer combines trimming, edging, and mowing into one 20V MAX tool with two 4.0 Ah batteries included. Its 12-inch cutting width is well-suited for smaller properties where storage space is limited.
BLACK+DECKER 12-Inch 20V MAX Trimmer and Wheeled Edger
Best for: small lawns needing dedicated wheeled edging
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 20V MAX
- Cutting Swath
- 12 in
- Power Source
- battery
View on Amazon: BLACK+DECKER 12-Inch 20V MAX Trimmer and Wheeled Edger
This cordless tool pairs a 12-inch cutting swath with a 20V MAX 4.0 Ah battery pack. It converts between a string trimmer and a wheeled edger, giving you dual-function lawn maintenance. A two-speed selector lets you balance power against runtime, while the power drive transmission boosts torque. It suits you if you maintain small to medium yards and want guided wheeled edging alongside basic 0.065-inch line trimming.
Pros
- Supplied with a 4.0 Ah 20V MAX battery pack
- Converts into a wheeled edger for border trimming
- Two-speed control regulates power and runtime
- Power drive transmission provides extra cutting torque
Cons
- Narrow 12-inch cutting swath
- Uses lightweight 0.065-inch line
Good fit if
- You want built-in wheels to guide your lawn edging.
- You prefer running on the BLACK+DECKER 20V MAX battery platform.
Skip if
- You need a wider cutting swath than 12 inches for broad coverage.
- You require thick trimming line for dense weeds and heavy brush.
Verdict: BLACK+DECKER 12-Inch 20V MAX Trimmer and Wheeled Edger combines a 4.0 Ah battery with an integrated wheel for border work. Its 12-inch swath and 0.065-inch line serve light trimming and clean perimeter maintenance.
BLACK+DECKER 20V String Trimmer and Sweeper Kit
Best for: combined yard trimming and hard-surface sweeping
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 20V MAX
- Power Source
- battery
- Line Feed System
- automatic
View on Amazon: BLACK+DECKER 20V String Trimmer and Sweeper Kit
This cordless combo kit pairs a 20V MAX string trimmer with a hard-surface sweeper. It runs on a 4.0 Ah battery, which supplies twice the capacity of the standard 2.0 Ah pack. The trimmer uses an automatic feed spool, advancing line without bump feeding. It suits you if you need to trim yard edges and immediately clear driveways, sidewalks, or patios using a single battery platform.
Pros
- Automatic feed spool advances line without manual bumping
- Includes a 4.0 Ah battery providing twice the capacity of 2.0 Ah packs
- Comes with a matched sweeper for driveways, sidewalks, and decks
- Backed by a 2-year warranty
Cons
- Cutting swath diameter is not stated in official specs
- 20V MAX platform provides lower voltage than 40V or 56V alternatives
Good fit if
- You want both a string trimmer and a sweeper on the same 20V MAX battery system.
- You prefer an automatic line feed system that eliminates the need to bump the head.
Skip if
- You need the higher power output of a 40V, 56V, or 60V platform.
- You only want a standalone trimmer without an extra sweeper unit.
Verdict: BLACK+DECKER 20V String Trimmer and Sweeper Kit provides automatic line advancement and an extra hard-surface cleanup tool on a 4.0 Ah battery. It offers a practical two-in-one maintenance package for yard edging and driveway clearing.
Worx 20V 13-Inch Cordless Trimmer and Edger
Best for: lightweight trimming, wheeled edging, and mini-mowing
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 20V
- Cutting Swath
- 13 in
- Power Source
- battery
- Motor Type
- brushless
- Shaft Type
- telescopic
This cordless tool combines a 13-inch string trimmer, wheeled edger, and mini mower in one 6.62-pound unit. You run it on a 20V 4.0 Ah battery paired with a brushless motor. It features an electronic push-button line feed, dual support wheels, and a 90-degree pivoting head. It suits you if you need a lightweight, multi-purpose tool for small to medium lawn borders without carrying separate edging and mowing equipment.
Pros
- Weighs 6.62 pounds for reduced physical fatigue
- Push-button line feed dispenses line without bump feeding
- Converts between trimming, wheeled edging, and mini-mowing
- Telescopic shaft and 7-position handle adjust to your height
Cons
- 13-inch cutting swath is narrower than 15-inch or 16-inch alternatives
- 20V platform delivers lower operating voltage than 40V or 60V models
Good fit if
- You want a single tool that trims, edges on wheels, and mini-mows.
- You prefer an on-demand push-button line feed over bump mechanisms.
- You already own or plan to use WORX Power Share battery tools.
Skip if
- You need a wider 15-inch or 16-inch swath for large properties.
- You prefer high-voltage 40V or 60V platforms for heavy commercial work.
Verdict: WORX 13-Inch 20V Cordless 3-in-1 Trimmer combines push-button line feeding and wheeled edging versatility on a lightweight 20V platform. It provides dependable multi-function utility for property borders that do not require high-voltage gear.
Greenworks 40V 16-Inch String Trimmer
Best for: versatile multi-attachment yard trimming
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 40V
- Cutting Swath
- 16 in
- Power Source
- Battery
- Motor Type
- Brushless
- Cutting Width
- 16-Inch
This 40V cordless string trimmer gives you a wide 16-inch cutting path powered by an included 4.0 Ah battery and a brushless motor. It features two speed settings with a variable-speed trigger to match power to lawn density. Its attachment-capable straight shaft accepts optional tools like edgers and pole saws. It suits you if you want wide cutting coverage and multi-tool flexibility on a 40V battery platform.
Pros
- Wide 16-inch cutting swath
- Brushless motor with 2-speed variable trigger
- Works with five optional yard-care attachments
- Includes a 40V 4.0 Ah battery
Cons
- Total weight is 15.2 pounds
- Additional tool attachments are sold separately
Good fit if
- You need a broad 16-inch cutting width for larger trimming areas.
- You plan to expand into attachments like pole saws or edgers.
- You want two speed settings with variable trigger control.
Skip if
- You prefer an ultralight trimmer below 15 pounds.
- You already use a 60V or 80V cordless tool system.
Verdict: Greenworks 40V 16-Inch Brushless String Trimmer delivers wide swath coverage and modular attachment support powered by a 4.0 Ah battery. It gives you flexible multi-season yard trimming without gas maintenance.
Husqvarna 16-Inch Dual-Direction Trimmer
Best for: trimming lawn edges with directional clipping control
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Cutting Swath
- 16 in
- Power Source
- battery
- Cutting Width
- 16-Inch
- Dimensions
- 68 × 13 × 5 inches
- Weight
- 7 pounds
The Husqvarna 320iL is a cordless string trimmer powered by an included 4.0 Ah battery and charger. It features a wide 16-inch cutting swath, a lightweight 7-pound build, and a dual-direction trimmer head that lets you control clipping discharge. With an integrated power boost mode and touchpad controls, this tool fits you if you need a wide cutting path and directional control for routine yard trimming without excess weight.
Pros
- Wide 16-inch cutting width covers broad areas quickly
- Lightweight 7-pound total tool weight reduces fatigue
- Dual-direction head redirects clippings away from beds and walkways
- Power boost mode increases power output for dense weeds
Cons
- Length of 68 inches has no telescoping or folding shaft listed
- Fixed 16-inch cutting swath offers no narrow cutting setting
Good fit if
- You want a full 16-inch cutting swath on a 7-pound frame.
- You need to direct grass clippings away from hardscapes and flowerbeds.
- You prefer an all-in-one package that includes a 4.0 Ah battery and charger.
Skip if
- You need a collapsible or telescoping shaft for compact storage spaces.
- You want a multi-tool shaft capable of accepting interchangeable attachments.
Verdict: Husqvarna 320iL 16-Inch Cordless String Trimmer pairs a wide cutting path with a lightweight 7-pound frame and directional debris control. It provides simple push-button operation and power reserves for maintaining clean property borders.
RYOBI ONE+ 18V 13-Inch String Trimmer and Edger
Best for: light trimming and edging in smaller yards
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 18V
- Cutting Swath
- 11 in. to 13 in.
- Line Feed System
- auto-feed
- Cutting Width
- 13-Inch
- Power Source
- Cordless
View on Amazon: RYOBI ONE+ 18V 13-Inch String Trimmer and Edger
This cordless tool gives you a dual-function trimmer and edger powered by an 18V 4.0 Ah battery pack. It features an adjustable cutting swath between 11 and 13 inches, an auto-feed line head, and a pivoting head for edging tasks. At 7 pounds, it provides variable speed control for precise yard maintenance. It suits you if you want a lightweight trimming setup with dedicated edging capability on the RYOBI 18V platform.
Pros
- Adjustable cutting swath from 11 inches to 13 inches
- Head pivots to convert from trimming to edging
- Auto-feed line head compatible with 0.065-inch and 0.080-inch line
- Weighs 7 pounds with variable speed trigger
- Includes 18V 4.0 Ah battery and charger
Cons
- 18V output is lower than 40V and 60V alternatives
- 13-inch maximum cut swath is narrower than 15-inch or 16-inch tools
Good fit if
- You want a 7-pound trimmer with a pivoting head for edging
- You need an adjustable cutting swath between 11 and 13 inches
- You already use or plan to use RYOBI 18V tools
Skip if
- You need a wider 15-inch or 16-inch cutting path
- You require higher voltage for thick, heavy brush
Verdict: RYOBI ONE+ 18V 13-Inch String Trimmer and Edger delivers adjustable cutting widths and pivoting edger capability in a manageable 7-pound build. Its included 4.0 Ah battery provides dependable runtime on a compact 18-volt platform.
RYOBI 40V 15-Inch Attachment Capable String Trimmer
Best for: modular yard care with universal tool attachments
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 40-Volt
- Cutting Swath
- 13 in. to 15 in.
- Power Source
- battery
- Line Feed System
- bump-feed
- Size
- 15-Inch
View on Amazon: RYOBI 40V 15-Inch Attachment Capable String Trimmer
This RYOBI string trimmer pairs a 40-volt power head with an included 4.0 Ah battery and a 90-minute charger. You can adjust the cutting swath between 13 inches and 15 inches to balance battery runtime against wider coverage. It features a bump-feed line head and variable-speed trigger. Because the shaft accepts Expand-It and universal attachments, it suits you if you plan to power multiple yard tools from one 40-volt battery system.
Pros
- Shaft accepts RYOBI Expand-It and universal attachments
- Adjustable cutting width between 13 inches and 15 inches
- Variable speed trigger provides output control
- Includes 40V 4.0 Ah battery and 90-minute charger
Cons
- Total weight is 13.9 pounds
- Uses bump-feed line advance rather than auto-feed
- Included charger requires 90 minutes for a full cycle
Good fit if
- You want to use one power head with multiple yard tool attachments.
- You need the option to switch between 13-inch and 15-inch cutting swaths.
- You want variable-speed throttle control for trimming edges.
Skip if
- You prefer a lighter trimmer than this 13.9-pound unit.
- You want an automatic or push-button line feeding system.
Verdict: RYOBI 40V 15-Inch Attachment Capable String Trimmer provides flexible 13- to 15-inch cutting widths and full compatibility with universal tool attachments. It is a solid 40-volt option if you want expandable multi-tool functionality and do not mind its 13.9-pound weight.
Makita 18V Brushless 13-Inch String Trimmer
Best for: precision trimming with long battery runtime
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 18V
- Cutting Swath
- 13 in
- Power Source
- battery
- Motor Type
- brushless
- Cutting Width
- 13-Inch
This 18V Makita string trimmer runs on an included 4.0 Ah battery and features an efficient brushless motor that reaches up to 6,000 RPM. You get a compact 13-inch cutting swath paired with a variable speed trigger and a high/low button for power control. Rated for up to one hour of continuous runtime, it suits you if you need steady, controlled trimming for standard residential yard edges without gas maintenance.
Pros
- Brushless motor delivers up to 6,000 RPM
- Up to 1 hour of runtime with 4.0 Ah battery
- High/low button and variable speed trigger for pace control
- Zero gas emissions, pull starts, or oil mixing
Cons
- 13-inch cutting swath is narrower than 15-inch or 16-inch models
- 18V platform delivers lower voltage than 40V or 60V options
Good fit if
- You want up to one hour of run time from an 18V 4.0 Ah battery.
- You prefer a compact 13-inch cutting path for tight spaces.
- You need dual-speed selection with variable trigger speed control.
Skip if
- You need a wider 15-inch or 16-inch cutting width for larger lots.
- You want higher voltage output from a 40V or 60V platform.
Verdict: Makita 13-Inch Brushless Cordless String Trimmer combines an efficient motor with dual-speed selection and up to an hour of operating time. It provides dependable 18V power for routine yard maintenance.
Greenworks 82V 8-Inch Cordless Lawn Edger
Best for: Long-lasting, deep lawn edging
- Battery Capacity
- 4.0 Ah (what this guide is about)
- Voltage
- 82V
- Power Source
- battery
- Motor Type
- brushless
- Application
- Lawn
- Dimensions
- 70.7 × 8.5 × 5 inches
This Greenworks 82V cordless lawn edger uses a 4.0 Ah battery to deliver up to 3 miles of edge on a single charge. It features a direct drive brushless motor for consistent power and a heat-treated 8-inch blade. The unit reaches a maximum cutting depth of 2.2 inches. You get a dual-port charger and a 4-year warranty on both the tool and battery included.
Pros
- 82V brushless motor delivers up to 1.5 kW of power
- Cuts up to 3 miles on a single 4.0 Ah charge
- 2.2-inch maximum cutting depth for precise lines
- Includes dual-port charger and 4-year warranty
Cons
- 8-inch cutting width is narrower than standard trimmers
- 28.2-pound weight may feel heavy during extended use
- Designed strictly for edging, not trimming or mulching
Good fit if
- You need precise lawn borders with a 2.2-inch depth
- You want to edge up to 3 miles per charge
- You already own Greenworks 82V batteries
Skip if
- You need a multi-tool for trimming and edging
- You prefer a lighter unit under 20 pounds
- You require a cutting width wider than 8 inches
Verdict: Greenworks 82V 8" Edger with 4.0 Ah Battery provides commercial-grade power for homeowners who prioritize long runtime and deep, clean cuts. It suits users who need a dedicated edging tool rather than a versatile trimmer.
Specifications side by side
| Spec | EGO Power+ 56V 16-Inch String Trimmer and Edger | Greenworks 60V 16-Inch String Trimmer | Greenworks 60V 13-Inch Trimmer 3-Tool Combo | EGO Power+ 16-Inch Carbon Fiber String Trimmer | WORX 15-Inch Brushless 40V String Trimmer | BLACK+DECKER 12-Inch 20V Max 3-in-1 Trimmer | BLACK+DECKER 12-Inch 20V MAX Trimmer and Wheeled Edger | BLACK+DECKER 20V String Trimmer and Sweeper Kit | Worx 20V 13-Inch Cordless Trimmer and Edger | Greenworks 40V 16-Inch String Trimmer | Husqvarna 16-Inch Dual-Direction Trimmer | RYOBI ONE+ 18V 13-Inch String Trimmer and Edger | RYOBI 40V 15-Inch Attachment Capable String Trimmer | Makita 18V Brushless 13-Inch String Trimmer | Greenworks 82V 8-Inch Cordless Lawn Edger |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Voltage | 56V | 60V | 60V | 56V | 40V | 20V MAX | 20V MAX | 20V MAX | 20V | 40V | not specified | 18V | 40-Volt | 18V | 82V |
| Cutting Swath | 16 in. | 16 in | 13 in | 16 in. | 15 in | 12 in | 12 in | not specified | 13 in | 16 in | 16 in | 11 in. to 13 in. | 13 in. to 15 in. | 13 in | not specified |
| Power Source | not specified | not specified | battery | not specified | not specified | battery | battery | battery | battery | Battery | battery | not specified | battery | battery | battery |
| Motor Type | brushless | brushless | not specified | not specified | brushless | not specified | not specified | not specified | brushless | Brushless | not specified | not specified | not specified | brushless | brushless |
| Shaft Type | carbon fiber | not specified | not specified | telescopic carbon fiber | not specified | not specified | not specified | not specified | telescopic | not specified | not specified | not specified | not specified | not specified | not specified |
| Line Feed System | POWERLOAD | Load N' Go | bump feed | POWERLOAD, LINE IQ | bump feed | not specified | not specified | automatic | push-button | not specified | not specified | auto-feed | bump-feed | not specified | not specified |
| Battery Capacity | 4.0Ah | 4.0Ah | 4.0Ah, 5.0Ah | 4.0Ah | 4.0Ah | 4.0 Ah | 4.0 Ah | 4.0Ah | 4.0Ah | 4.0 Ah | 4 Ah | 4.0Ah | 4.0 Ah | 4.0 Ah | 4.0Ah |
| Cutting Width | 16-Inch | 16-Inch | 13-Inch | 16-Inch | 15-Inch | 12-Inch | not specified | not specified | 13-Inch | 16-Inch | 16-Inch | 13-Inch | not specified | 13-Inch | not specified |
| Drive Type | not specified | not specified | Push | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Mowing Function | not specified | not specified | not specified | not specified | not specified | 3-in-1 | not specified | not specified | 3-in-1 | not specified | not specified | not specified | not specified | not specified | not specified |
| Application | not specified | not specified | Lawn | not specified | not specified | Lawn | not specified | not specified | Lawn | not specified | not specified | not specified | not specified | not specified | Lawn |
| Size | Trimmer + Edger + Power Head w/4.0Ah Battery | 60V 16" (4.0Ah) | 21" 3pcs combo with 3 Batteries | 16" | 15" | 12 inches | not specified | not specified | No Size | 16" Trimmer (4Ah) Gen 2 | 320iL Kit | 13 inches | 15-Inch | 13 inches | 82V 8" Edger (4.0Ah) |
| Dimensions | 40.9 × 16.9 × 5 inches | 68.5 × 11.7 × 5 inches | not specified | not specified | 68.3 × 12.8 × 10.7 inches | not specified | not specified | not specified | 43.1 × 35.6 × 5 inches | 65.4 × 11.8 × 5 inches | 68 × 13 × 5 inches | 28 × 10 × 5 inches | 35.4 × 7.8 × 6.7 inches | 8.07 × 40.3 × 8.39 inches | 70.7 × 8.5 × 5 inches |
| Weight | not specified | 18.7 pounds | not specified | not specified | 9.42 pounds | not specified | not specified | not specified | 6.62 pounds | 15.2 pounds | 7 pounds | 7 pounds | 13.9 pounds | not specified | 28.2 pounds |
| Color | black | Multicolor | Green | green | Black and Orange | multi-color | Black | Black | Black and Orange | Green | Orange | GREEN | Multicolor | Teal | Green |
| Model | MHC1603 | ST60L413 | not specified | not specified | WG185 | not specified | LSTE525 | not specified | WG173 | ST40L414 | 970480104 | P20180 | #RY40250 | XRU23SM1 | 82ES15-4DP |
You can compare the best power tool combo kits with 4 0 ah to share battery platforms across other equipment.
Key Specs to Compare for 4.0 Ah Models
-
Check Voltage for Power Needs
Voltage indicates the power level of the tool. Higher voltage models like the Greenworks 60V or 82V provide more torque for thick weeds and large yards. Lower voltage options, such as the 18V RYOBI or 20V BLACK+DECKER, are sufficient for small lawns and light trimming. Match the voltage to your property size to ensure the tool has enough reserve power without being overkill for your daily tasks.
-
Evaluate Cutting Width Coverage
Cutting width determines how much grass you clear per pass. A 16-inch path, found on the EGO Power+ and Greenworks 60V, covers ground faster than a 12-inch or 13-inch model. Wider cuts reduce the number of passes needed, saving time on larger properties. Narrower widths offer better maneuverability around tight obstacles but require more passes. Choose based on your yard's open space.
-
Consider Weight and Handling
Weight affects fatigue during extended use. The Husqvarna 16-Inch Dual-Direction Trimmer weighs only 7 pounds, making it easy to handle for long periods. In contrast, the Greenworks 60V 16-Inch Trimmer weighs 18.7 pounds, which may cause strain. Lighter tools are better for users who prefer less physical effort, while heavier models often house more robust motors for demanding jobs.
-
Look for Edging Capabilities
Some trimmers double as edgers, adding versatility. The EGO Power+ 56V model includes a dedicated edging function, allowing you to maintain lawn borders without switching tools. The BLACK+DECKER 20V MAX Trimmer and Wheeled Edger also features integrated edging with a wheel for stability. If you frequently trim along sidewalks or flower beds, a dual-function tool saves storage space and effort.
-
Assess Motor Type Efficiency
Brushless motors offer greater efficiency and longer life than brushed motors. The Makita 18V Brushless String Trimmer uses this technology to provide up to an hour of runtime on a single charge. Brushless motors generate less heat and require less maintenance. If you plan to use your trimmer frequently, a brushless motor ensures consistent performance and durability over time.
Frequently asked questions
Which string trimmer with a 4.0 Ah battery offers the widest cutting path?
The EGO Power+ 56V 16-Inch String Trimmer and Edger and the Greenworks 60V 16-Inch String Trimmer both feature a 16-inch cutting width. This broad path covers ground faster than narrower models. The Husqvarna 320iL also provides a 16-inch cut while maintaining a lightweight 7-pound frame for easier handling during extended use.
What is the lightest string trimmer with a 4.0 Ah battery?
The Husqvarna 320iL 16-Inch Cordless String Trimmer is the lightest option at just 7 pounds. The WORX 20V 13-Inch Cordless Trimmer and Edger follows closely at 6.62 pounds. These low weights reduce fatigue when trimming overhead or working on slopes for long periods.
Does any 4.0 Ah trimmer include an edging function?
Yes, the EGO Power+ 56V 16-Inch String Trimmer and Edger combines trimming and edging in one tool. The BLACK+DECKER 12-Inch 20V MAX Trimmer and Wheeled Edger also offers dedicated edging with an integrated wheel. Additionally, the RYOBI ONE+ 18V model features a pivoting edger capability for clean border maintenance.
Which 4.0 Ah trimmer is best for heavy-duty weed cutting?
The Greenworks 82V 82V 8-Inch Cordless Lawn Edger provides commercial-grade power for thick vegetation. For trimming, the Greenworks 60V 16-Inch String Trimmer delivers high-voltage performance suitable for demanding tasks. These higher voltage platforms handle dense weeds more effectively than lower voltage alternatives.
Is there a brushless motor option among these 4.0 Ah trimmers?
The Makita 18V Brushless 13-Inch String Trimmer features a brushless motor for efficient operation. The WORX 15-Inch Brushless 40V String Trimmer also uses brushless technology. Brushless motors typically offer longer runtime and increased durability compared to brushed motor designs.
Can I use these trimmers with multiple tool attachments?
The RYOBI 40V 15-Inch Attachment Capable String Trimmer supports universal tool attachments for expanded functionality. The Greenworks 60V 13-Inch Trimmer 3-Tool Combo includes a mower, blower, and trimmer for a complete yard care system. These options allow you to share batteries across different tools.
What is the longest runtime available with a 4.0 Ah battery?
The Makita 13-Inch Brushless Cordless String Trimmer provides up to an hour of operating time. The EGO Power+ 56V model offers approximately 45 minutes of runtime. These durations depend on the voltage platform and motor efficiency of each specific tool.