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If you maintain a mid- to large-sized yard or need heavy-duty trimming around fences and hard-to-reach edges, the choice of an 80V string trimmer matters. The right model balances battery runtime, cutting capacity, and ease of use so you can finish jobs in fewer battery swaps and with less strain. This guide shortlists the top 7 80V string trimmers for that purpose. We evaluate cordless power and runtime, cutting performance, build and comfort, and practical features that affect real-world yard work. Read on for concise buying guidance and the specific factors we used to select these top options.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Kobalt 80V Max 16-inch Straight Cordless String Trimmer (Tool Only) |  |
| Best Quality Built to a higher standard if you want something more solid | Greenworks 80V 16" Carbon Fiber Cordless String Trimmer with 2.0 Ah Battery |  |
| Best Value The sweet spot between price and what you get | Greenworks Pro 80V 16-Inch Brushless String Trimmer (Tool Only, Gen 2) |  |
| Best Budget The cheapest option that still gets the job done reliably | Greenworks 80V 16" Brushless Cordless String Trimmer (Tool Only) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Greenworks 80V 16 in String Trimmer and 700 CFM Blower Combo (2.5Ah Battery) |  |
| Most Popular A crowd favorite that many people choose with confidence | Greenworks 80V 16" Brushless Cordless String Trimmer with 2.0Ah Battery |  |
| Best Seller A high-volume bestseller chosen again and again | Greenworks 80V 16" Brushless Cordless String Trimmer with 2.0Ah Battery |  |
Kobalt 80V Max 16-inch Straight Cordless String Trimmer (Tool Only)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 16 inches |
| Speed | 6500 rpm |
| Style Name | straight |
The Kobalt 80V Max 16-inch straight cordless string trimmer is a tool-focused trimmer body sold without a battery that targets homeowners who want the power of an 80V platform. It delivers a 16-inch cutting swath at up to 6500 rpm, which makes quick work of routine lawn trimming, clearing overgrown edging, and maintaining garden borders. The straight-shaft design provides reach and control for working around beds and fences, and the bare-tool format lets you use existing Kobalt 80V batteries or add the battery size you prefer. Practical benefits include a wide cutting path to reduce passes and a high top speed for thicker grass, while the trade-offs are that you must supply a compatible battery and that straight shafts are less compact for storage than curved models. Safety guidance follows typical trimmer practice such as eye protection and keeping bystanders clear. For a balanced homeowner wanting strong cordless performance and flexibility to choose battery capacity, this is a sensible chassis to build from.
Best for: Homeowners who want strong cordless performance and the flexibility to choose or reuse an 80V battery, and who need a tool that handles regular lawn trimming and edging efficiently.
Less Ideal for: Gardeners who need an all-in-one package ready to run out of the box or who prioritize compact storage and ultra-lightweight maneuvering.
- Powerful 80V platform suited for heavy trimming and thicker grass
- 16-inch cutting width covers more ground and reduces passes
- High no-load speed (6500 rpm) for efficient cutting
- Straight shaft gives good reach and control around beds and fences
- Sold as a bare tool so battery and charger must be purchased separately
- Straight shaft is longer and less compact to store than curved-shaft trimmers
Verdict: Buy this bare-tool Kobalt 80V trimmer if you want an 80V-class, 16-inch trimmer chassis to pair with your preferred battery for powerful, efficient lawn trimming.
Greenworks 80V 16" Carbon Fiber Cordless String Trimmer with 2.0 Ah Battery
| Power Source | Battery Powered |
|---|---|
| Cutting width | 16 inches |
| Speed | 6000 rpm |
| Number of Batteries | 1 Lithium Ion (included) |
| Battery Average Life | 2 miles |
This Greenworks 80V 16" carbon fiber string trimmer is built for heavy-duty yard work while staying quieter and lighter than gas models. The brushless 80V motor spins at 6,000 RPM, making it capable of cutting 1" brambles and 8" grass; the .095" dual bump-feed head and adjustable cutting width handle uneven terrain, fence lines and rocky ditch banks. It ships with a 2.0 Ah lithium-ion battery rated to cover roughly two miles of fence line per charge and a variable-speed trigger lets you dial back power for delicate edging or push full torque for dense growth. The carbon fiber shaft reduces weight for longer sessions and improves maneuverability. Practical limits are battery runtime for very large properties and the need to carry spare batteries for marathon jobs, and the bump-feed head still requires occasional line changes. For buyers focused on performance, it replaces many gas tasks with instant starts, lower vibration and quieter operation while fitting into Greenworks' 80V battery ecosystem for shared batteries across tools.
Best for: A performance-focused homeowner or landscape enthusiast who needs gas-level cutting power without gas maintenance and values a quieter, lighter trimmer for frequent use.
Less Ideal for: If you only need occasional light trimming on a small lawn and prefer minimal battery management, a lower-voltage or corded model may be a simpler choice.
- High-power 80V brushless motor delivering up to 6,000 RPM for gas-equivalent cutting
- .095" dual bump-feed head for continuous line feed and handling rough terrain
- Lightweight carbon fiber shaft improves maneuverability and reduces operator fatigue
- Variable-speed trigger for precise control between delicate edging and heavy cutting
- Includes 2.0 Ah lithium-ion battery compatible with the 80V ecosystem
- 2.0 Ah battery limits continuous runtime on very large lots and may require spare batteries for extended jobs
- Bump-feed line head requires occasional manual reloading and adjustment
Verdict: Choose this trimmer if you want near–gas power in a lighter, quieter 80V cordless tool that integrates with a shared battery system.
Greenworks Pro 80V 16-Inch Brushless String Trimmer (Tool Only, Gen 2)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 16 inches |
| Speed | 6300 rpm |
| Battery Average Life | 60 minutes |
The Greenworks Pro 80V 16-inch brushless string trimmer is a high-power cordless trimmer sold as a tool-only unit so you can pair it with compatible 80V batteries and chargers. It delivers a 16-inch cutting width and a 0.095" dual-line bump-feed head driven by a brushless motor that provides strong cutting performance for thick weeds and overgrown grass. Typical use is mid- to large-lawn trimming and edge cleanup where gas-level power is useful but without fumes or routine engine maintenance. Notable features are variable speed control, an adjustable auxiliary handle, and a push-button start for easier handling and comfort during longer jobs. Practical benefits include quieter operation than gas, reduced maintenance, and the ability to use the same 80V batteries across other tools. Important limitations are that batteries and charger are not included and runtime depends on the battery you separately purchase, so plan battery capacity to match larger jobs.
Best for: Gardeners who want near-gas power without the maintenance and prefer to invest in a high-voltage battery platform for frequent or larger lawn jobs.
Less Ideal for: Casual users with very small yards or those who expect an out-of-the-box cordless kit with battery and charger included should consider simpler bundled models instead.
- Brushless 80V motor delivers strong cutting power comparable to small gas trimmers
- 16-inch cutting width covers more area per pass for faster trimming
- Variable speed and adjustable auxiliary handle improve control and comfort
- Bump-feed dual 0.095" line head is simple to reload and effective on thick growth
- Part of the 80V battery platform so batteries can be shared with other tools
- Sold as tool-only so battery and charger must be purchased separately
- Actual runtime depends on battery choice and is not specified with this kit
Verdict: If you already use or plan to build an 80V battery system and need near-gas trimming power, this 16-inch brushless trimmer is a practical, high-performance choice.
Greenworks 80V 16" Brushless Cordless String Trimmer (Tool Only)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 16 inches |
| Speed | 6200 rpm |
| Included Components | Trimmer, Guard, Auxiliary Handle, Operators Manual |
The Greenworks 80V 16" brushless string trimmer is a tool-only cordless trimmer built for homeowners who already own Greenworks 80V batteries. It delivers a wide 16-inch cutting path using .080" dual line and a bump-feed head for quick line advancement. The brushless motor provides stronger torque, quieter operation, and longer motor life while the variable-speed trigger helps dial back power for edging near plants or increase it for heavy patches. The unit is lightweight and ergonomically designed to reduce fatigue during longer sessions and includes an auxiliary handle and guard for control. Because it is tool-only, you can keep costs down if you already have an 80V battery and charger, but you will need to buy those separately if you do not. Expect good performance on typical yard grass and weeds, though runtime and peak power depend on the capacity of the battery you pair with it.
Best for: Homeowners who already own Greenworks 80V batteries and want a powerful, low-maintenance trimmer that expands their 80V toolset while keeping upfront cost down.
Less Ideal for: Buyers who need a complete kit with battery and charger included or those without any 80V batteries should consider a bundled or battery-included model instead.
- Brushless motor for increased torque, quieter operation, and longer motor life
- 16-inch cutting width with .080" dual line covers ground quickly
- Variable-speed trigger offers control for delicate trimming or heavier cutting
- Bump-feed head enables fast line advancement without tools
- Tool-only format lets owners reuse existing 80V batteries to save money
- Does not include battery or charger so newcomers must purchase them separately
- Performance and runtime vary with the battery you choose and are not provided with the tool
Verdict: If you already own Greenworks 80V batteries, this brushless 16" trimmer is a cost-effective way to add high-performance trimming to your 80V system.
Greenworks 80V 16 in String Trimmer and 700 CFM Blower Combo (2.5Ah Battery)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 16 inches |
| Number of Batteries | 1 Lithium Ion (included) |
| Airflow | 700 CFM / 170 MPH |
This Greenworks 80V combo puts a brushless 16-inch string trimmer and a powerful axial blower into one kit for straightforward yard maintenance. The trimmer uses a .095" dual-line bump feed and a variable-speed trigger, letting you adjust cutting speed for delicate edging or thicker growth, while the brushless motor improves torque and service life. The included blower delivers up to 700 CFM and a turbo boost mode to move heavy, wet leaves, and cruise control helps keep airflow steady on larger jobs. Because it is battery powered there is no gas, oil, or pull starts to worry about, and the manufacturer claims up to about 60 minutes runtime on the 2.5 Ah battery for typical tasks. Practical benefits are reduced maintenance, quieter operation around neighbors, and instant starts when you need them. Limitations are typical of compact battery kits: runtime will fall on demanding jobs and you may want a higher-capacity battery for long sessions, and the combo adds bulk compared with buying a single tool. For someone prioritizing dependable starting and low upkeep, this kit covers most residential trimming and cleanup needs.
Best for: Homeowners who want a low-maintenance, reliable cordless solution for regular lawn edging and seasonal leaf cleanup and who value instant starts and quieter operation over gas engine upkeep.
Less Ideal for: Users who routinely run multi-hour commercial jobs or large properties without investing in higher-capacity batteries should consider professional-grade or gas-powered alternatives.
- Brushless motors for better torque, quieter operation, and longer motor life
- 16" cutting width and variable-speed trigger for efficient coverage and control
- Blower rated at 700 CFM with turbo mode and cruise control for moving heavy debris
- Includes a 2.5 Ah battery for cordless convenience and instant starts with no gas or oil
- 2.5 Ah battery may limit continuous runtime on heavy-duty jobs compared with larger batteries
- Combo adds more bulk for storage and transport than a single-tool purchase
Verdict: Buy this kit if you want a dependable, low-maintenance 80V cordless trimmer and blower combo that delivers gas-comparable power with quiet, instant starts.
Greenworks 80V 16" Brushless Cordless String Trimmer with 2.0Ah Battery
| Power Source | Battery Powered |
|---|---|
| Cutting width | 16 inches |
| Speed | 6500 rpm |
| Battery Average Life | 30 minutes |
| Number of Batteries | 1 Lithium Ion (included) |
The Greenworks 80V 16" brushless cordless string trimmer is built for heavy-duty trimming and edging on medium to large lawns. Its 80V battery platform and brushless motor deliver strong cutting torque that handles thick grass and tough weeds while running quieter than gas models. The 16" cutting path with .080" dual line covers wide swaths quickly, and the bump-feed head makes advancing line simple during a job. A variable-speed trigger gives fine control when working close to flower beds or along hard edges, and the included 2.0Ah battery plus 30-minute rapid charger get you back to work quickly between sessions. The unit is relatively lightweight and ergonomic for longer use, but the included 2.0Ah pack limits continuous runtime compared with larger batteries in the same platform. Accessories and larger-capacity batteries are available within the 80V system if you need extended runtime. This trimmer is a straightforward, low-maintenance alternative to gas for homeowners who want near-professional cutting power without the fuss of fueling and heavy upkeep.
Best for: Homeowners who prioritize cutting performance and want a gas-alternative trimmer that can handle thick grass and frequent edging on medium to large lawns.
Less Ideal for: Buyers who need very long continuous runtime without swapping batteries or those who only have small yards and prefer a smaller, lighter tool.
- Strong 80V brushless motor suitable for thick grass and demanding yard work
- 16-inch cutting path with .080" dual line for efficient coverage
- Variable-speed trigger for precise control when edging or trimming around landscaping
- Bump-feed head allows quick line advancement without stopping work
- Includes 2.0Ah battery and 30-minute rapid charger for faster turnaround between jobs
- Included 2.0Ah battery provides moderate runtime compared with larger 80V batteries
Verdict: Choose this trimmer if you want near-gas cutting power and precise control for heavy-duty edging and trimming without the maintenance of a gas engine.
Greenworks 80V 16" Brushless Cordless String Trimmer with 2.0Ah Battery
| Power Source | Battery Powered |
|---|---|
| Cutting width | 16 inches |
| Speed | 6000 rpm |
| Number of Batteries | 1 Lithium Ion (included) |
The Greenworks 80V 16" brushless string trimmer is built to handle medium to large yards where tougher grass and weeds need a stronger cordless tool. It runs on the 80V battery platform and uses a .095" dual-line head with a bump-feed for quick line advancement, while the brushless motor provides more torque, quieter operation, and longer motor life. The variable-speed trigger gives precise control when working around flowerbeds and edging, and the manufacturer describes the unit as lightweight and maintenance free with no gas or oil to mix. Practical benefits include faster coverage from the 16" cutting swath, instant starts, and reduced vibration and noise compared with older gas models. Expect good performance on thick growth, but runtime will depend on the included 2.0Ah battery so heavy-duty or continuous commercial use may require spare batteries or a higher-capacity pack.
Best for: Buyers who want a reliable, low-maintenance cordless trimmer that performs close to gas models for routine yard upkeep and prioritize ease of use and quiet operation.
Less Ideal for: Professional landscapers or users who need long continuous runtime without swapping batteries should consider higher-capacity battery systems or commercial units instead.
- Strong 80V brushless motor for effective cutting through thick grass and weeds
- 16-inch cutting width with .095" dual line for faster coverage and cleaner trims
- Variable-speed trigger for precise control around plants and landscaping
- Bump-feed head allows quick line advancement without disassembly
- Maintenance-free electric design with no gas, oil, or complex idling maintenance
- Included 2.0Ah battery may limit continuous runtime for large properties
Verdict: This trimmer is the best pick for homeowners seeking a quiet, maintenance-free 80V cordless unit that delivers near-gas power for demanding residential trimming jobs.
Choosing the Right 80V String Trimmer: Key Factors to Consider
Battery Runtime and Recharge Strategy
Battery runtime determines how much trimming you can complete between charges. For larger yards an 80V system should deliver longer runtime than lower-voltage cordless options, but real-world runtime depends on throttle usage, line diameter, and whether you run at full speed for thick growth.
Consider whether you can swap batteries during a session, and whether the manufacturer's battery capacity is measured at a realistic discharge rate. Fast chargers shorten downtime but may affect long-term battery life. Think about keeping a spare battery or a charging plan if you regularly trim for more than the rated runtime.
Cutting Power and Line Compatibility
Cutting power influences how well the trimmer slices through thick grass, weeds, and small woody stems. Higher voltage systems typically sustain stronger cutting torque, which helps maintain RPM under load and prevents bogging when encountering heavier growth.
Line compatibility and recommended line diameters also matter. Thicker line cuts denser vegetation but demands more battery power. Check whether the head accepts common line sizes and whether the trimmer supports dual-line heads or bump-feed/tap-and-go mechanisms for fast line advancement.
Head Type and Ease of Line Replacement
The trimmer head is a high-usage component. Heads that allow quick, tool-free line changes save time and reduce frustration. Bump-feed heads are common and convenient, while auto-feed or twist-to-feed systems reduce interruptions but can be more complex to repair.
Also consider whether the head is balanced and resists wobble at speed, which affects cut quality and operator fatigue. Replaceable spool designs or conversion-ready heads allow you to switch line types or attach specialized cutting blades in some systems.
Ergonomics, Balance, and Vibration
How the trimmer carries and how it feels during extended use determines how long you can comfortably work. Shaft length, adjustable handles, and weight distribution influence reach and posture. A shoulder strap or harness attachment point can greatly reduce arm fatigue on long jobs.
Examine vibration levels and trigger feel. Variable-speed triggers let you dial power for delicate trimming or heavier cutting, saving battery life when full power is not needed. Adjustable handle positions help you maintain a neutral wrist angle when working along edges and around obstacles.
Build Quality and Weather Resistance
Durable housings, robust gearboxes, and protected motor assemblies extend service life in outdoor conditions. Metal gears or reinforced driveshafts handle higher torque loads better than thin-plastic internals, especially if you encounter hidden debris.
Weather resistance, sealed electrical connections, and simple maintenance access for cleaning debris also reduce failure risk. Consider how easy it is to clean the guard, undercut grass buildup, and replace wear items without specialized tools.
Attachments, Versatility, and Storage
Some 80V platforms let you swap trimmer heads for brushless hedge trimmers, pole saws, or edger attachments. A versatile platform reduces the number of separate tools you must own and makes seasonal yard chores easier to manage.
Think about storage footprint and how the shaft breaks down or folds. Quick-disconnect shafts or multi-tool connectors are useful for compact storage and for gardeners who already use the same battery ecosystem across multiple tools.
When an 80V Trimmer Is the Right Choice
Choose an 80V string trimmer if you routinely trim larger yards, deal with thick or overgrown vegetation, or want fewer battery swaps compared with lower-voltage systems. The higher voltage typically provides sustained torque under load, which is helpful when trimming along fences, cutting tall grasses, and finishing long runs of edging without the motor bogging down.
- Best for yards larger than a quarter acre or with dense growth
- Good for gardeners who prefer cordless power but need near-gas performance
- Useful when you want flexibility to attach other high-voltage platform tools
Common Power and Runtime Expectations
Manufacturers publish runtime claims that vary widely based on line diameter and throttle position. Expect shorter runtimes when trimming dense, wet growth or using thicker line. Using a moderate speed setting for lighter trimming can stretch battery life, while full-speed runs will drain packs faster. If you cannot complete your typical session on a single battery, plan for a second pack or a fast charger. Also consider battery health over time; larger-capacity cells degrade slower in terms of usable runtime, so higher-amp-hour batteries keep you working longer season after season.
- Run time depends heavily on throttle usage and line size
- Thicker line reduces runtime but improves cut on coarse weeds
- Plan battery swapping or spares for long sessions
Maintenance Tips to Extend Service Life
Keep the guard, head, and vents clear of grass clippings and debris after each use to prevent overheating and motor stress. Inspect the drive shaft coupling and gearbox area for chips or wear and address minor damage early to avoid cascading failures. Replace line spools with the correct diameter and trim any frayed ends before next use to preserve head balance. If your model has a metal gearbox, periodically check fasteners and apply recommended lubricants as outlined in the owner's manual.
- Clean debris from vents and guards after each use
- Check fasteners and gearbox for loosened parts
- Use recommended line diameter to avoid overloading the motor
Trimming Techniques for Better Results
Hold the trimmer at a 30- to 45-degree angle to the ground for a clean cut and to reduce scarring of turf. Move the head in a smooth arc rather than hacking at weeds; steady motion produces a more uniform finish and reduces strain on the motor. For edging, transition to a near-vertical angle and use the edge of the trimmer head to slice clean lines. Work in sections and overlap passes slightly to avoid missed strips, and pause periodically to check the head for line wear or balance issues.
- Use a steady arcing motion for even cuts
- Angle vertically for edging passes
- Overlap passes slightly for uniform coverage
Storage and Winter Care
Store batteries in a cool, dry place at partial charge to preserve cell life over winter. Remove batteries from the tool before storing and clean both the battery contacts and the trimmer terminals to prevent corrosion. If you use a detachable shaft or break-down design, store components laid flat or hung to avoid stress on joints. Drain or clean any residual grass away from moving parts before long storage to prevent pests and moisture damage.
- Store batteries cool and partially charged
- Clean contacts before storage
- Disassemble or hang to reduce stress on joints
How We Chose the Best 80V String Trimmer
We focused on attributes that affect how an 80V string trimmer performs in real yard and garden use. Selection began with units designed for homeowner to light-pro contractor workloads that list 80-volt battery systems or equivalent high-voltage platforms. From that pool we applied practical filters: battery runtime under typical trimming loads, cutting width and head system versatility, motor durability and cooling design, shaft and handle ergonomics, and included accessory or attachment compatibility. We excluded lightweight consumer models underpowered for large yards and anything that relied solely on low-voltage platforms. We prioritized trimmers with clear battery specifications and realistic runtime claims, robust head designs for easy line replacement, and a good balance of cutting width versus maneuverability. Durability cues such as metal gearbox components and sealed motor housings were weighted alongside user-focused features like variable speed triggers and tool-free adjustments. Exclusions included novelty products without documented runtime data, units intended only for ornamental trimming, and trimmers with no clear compatibility for spare batteries or common attachments. The result is a list of units that meet everyday gardener expectations for power, runtime, and usable features.
FAQ
How long does an 80V battery usually last on a single charge?
Runtime varies with throttle use and line thickness, but typical single-battery sessions range from 20 minutes at full power to over an hour under light trimming. Using thicker line or running at full speed reduces runtime significantly.
Can I use different battery sizes on the same 80V platform?
Many platforms accept multiple amp-hour capacities as long as they match the voltage. Higher amp-hour packs extend runtime but add weight. Check compatibility and balance weight versus runtime for comfortable handling.
Is an 80V trimmer louder than lower-voltage cordless models?
Noise level depends more on motor and head design than voltage alone, but higher-power systems may be slightly louder under load. Using recommended line sizes and keeping the head balanced helps minimize excess noise.
Are metal gearboxes worth the extra weight?
Metal gearboxes are more durable when you encounter heavy loads or occasional contact with hard objects. They add weight but reduce the risk of stripped gears and extend service life compared with thin-plastic gearcases.
How do I know which line diameter to use?
Choose line diameter based on vegetation density. Thinner line works for light grass and finishing, while thicker line is better for coarse weeds. Consult the tool's manual for the maximum recommended diameter to avoid overloading the motor.
Final Verdict
Prioritize the combination of battery runtime, cutting power, and head usability when choosing an 80V string trimmer. Expect tradeoffs between runtime and weight, and favor models with proven head designs and solid build features if you trim large or dense areas frequently. Decide whether you need a high-capacity battery or a lighter pack for maneuverability, and consider platform versatility if you want one battery ecosystem for multiple tools. Focus on the factors that reduce interruptions and operator fatigue to pick the right 80V trimmer for your yard.
