5 Best String Trimmer Under 150: Best Choices and Buying Guide

If you are shopping for the best string trimmer under 150, you are probably trying to avoid the two extremes that make yard work miserable: a gas trimmer that demands mixing, pulling, and ear protection, or a flimsy corded model that drags an extension cord through your flower beds. The good news is that this price band now includes genuinely capable cordless tools, provided you know which specs matter and which marketing claims you can ignore.

After comparing cordless trimmers on cutting swath, motor speed, battery capacity and platform, line-feed design, weight, edging capability, and included accessories, two models rose to the top. The WORX 20V 12″ 2-in-1 Cordless String Trimmer is my primary recommendation because it bundles two batteries, a push-button line feed, a tilting head, and a wheeled edging mode that makes sidewalk cleanup genuinely easy. The BLACK+DECKER 20V MAX String Trimmer and Edger is the clear alternative, and for plenty of shoppers it is the smarter pick: it is quieter, comfortable in the hand, and built around an automatic feed system that never requires bumping.

Below you will find five ranked picks, each with the strengths, trade-offs, and ownership details that actually affect day-to-day use. After the reviews, a buying guide covers swath size, voltage, runtime expectations, trimmer line, setup, maintenance, and troubleshooting, so you can match a trimmer to your yard rather than to a spec sheet.

Best String Trimmer Under 150 Picks at a Glance

1. WORX 20V 12″ 2-in-1 Cordless String Trimmer

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The WORX WG163 earns the top spot by solving two jobs in one tool. It converts from a string trimmer to an edger in seconds, and the 90-degree tilting head lets you angle the cutting line under fences, along retaining walls, and across sloped terrain where a fixed head has to fight the ground. The 12-inch cutting diameter and 7,600 rpm no-load speed suit routine grass and light weeds, which is what most suburban yards throw at a trimmer.

The line-feed system is the feature I would point to first. WORX uses a push-button command feed spool that advances line on demand instead of the old bump-and-pray method, and the trimmer ships with free spools for life. The 0.065-inch line diameter keeps the head light and battery draw reasonable. Rubberized support wheels attach for edging, giving you straighter lines along driveways and sidewalks, and the adjustable spacer guard lets you set how close the line reaches toward plants and landscape features.

At 5.5 pounds for the machine, it is light enough to carry one-handed between beds. Two 20V Power Share batteries come in the box along with the charger, a trimmer spool, the support wheels, and a safety guard. Because those batteries belong to the Power Share platform, they also run other WORX 20V tools, which softens the cost of expanding your yard kit later.

Trade-offs are worth naming. A 12-inch swath means more passes than a 14-inch trimmer on large lawns, and 0.065-inch line is not the right choice for brush, thick stalks, or long-neglected fence lines. If your trimming is mainly grass along edges and around obstacles, none of that is a problem. New owners should load the spool carefully and confirm the head is locked in the trimmer position before switching to edging, since a half-rotated head will not cut cleanly. Keep the spool free of grit and store batteries out of extreme heat and cold. For small to medium yards with regular edging, this is the most complete package here.

2. BLACK+DECKER 20V MAX String Trimmer and Edger

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The BLACK+DECKER LST300 ranks second because it handles the fundamentals exceptionally well and asks very little of the user. The POWERDRIVE transmission delivers more of the motor’s output to the cutting string, spinning at 6,200 rpm, and the 12-inch cutting swath matches the WORX above. Where it pulls ahead of most budget trimmers is the Automatic Feed Spool: line advances when the tool needs it, so there is no bumping, no stopping to pull line, and no guessing about how much is left.

Converting from trimmer to edger takes seconds, and the lightweight build with adjustable handle and height positions makes long sessions less tiring than a fixed-position tool. It is quiet and starts instantly, with none of the mixing, pull-starting, or exhaust smell of a gas unit. The steel deck adds durability where a plastic housing can flex, and the included 2.0 amp-hour lithium-ion battery pack is rated for 33 percent more runtime than the previous LBXR20 pack. A wall-mountable charging base is included, which is a nice touch for keeping the battery topped off between uses.

Two limitations stand out. Only one battery ships in the box, so a larger yard may leave you waiting on a charge unless you buy a spare. And although the trimmer converts to edging mode, there is no support wheel, so clean sidewalk lines depend on your own steadiness — the wheeled WORX design is easier to hold to a straight edge.

This is the better pick if you already own BLACK DECKER 20V MAX batteries and chargers because the platform spreads cost across other tools It is also the friendlier choice when you want to hand the trimmer to a family member without a lesson Setup is minimal attach the guard snap in the battery and adjust the handle and shaft height before the first cut Keep the AFS spool clean and wind replacement line evenly since uneven winding is the most common cause of feed trouble Stick with 0 065-inch line for grass and avoid forcing the head into thick woody growth If you want a second battery.

3. Weed Wacker Eater Electric String Trimmer Battery

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This cordless trimmer stands out in the budget class for raw power and battery volume. The 9,000 rpm cutting head and 2-in-1 trim-or-edge design give it the speed to work through dense grass, and the package includes two 4.0 amp-hour lithium batteries with a fast charger, which the listing describes as 60 to 90 minutes of uninterrupted use depending on conditions. For battery-powered weed whacking around a small to mid-sized yard, that is a generous allotment, and having two packs means you can work while one recharges.

The 12-inch cutting path is standard for this price range and covers ground reasonably fast. The line-feed system offers both automatic and manual modes: roughly 0.4 to 0.5 inches of line feeds automatically on each start, and pressing the release button repeatedly feeds about 0.4 inches at a time. You pull the line out to about 6 inches before the first use. Combined with a 5.95-pound weight, a balanced layout, and a detachable shaft that breaks down for compact storage, it is easy to live with in a small garage or shed.

Ergonomics lean toward accessibility. Controls are simple, noise is lower than many gas and corded alternatives, and the tool is light enough for extended trimming sessions. Because noise is modest, early-morning or evening trimming is less likely to draw complaints from neighbors.

Two caveats deserve attention. The batteries are packaged with this tool rather than advertised as part of a broad cross-tool platform, so confirm compatibility before assuming they will run other equipment you own or plan to buy. And with a shorter market track record than the WORX and BLACK+DECKER entries, long-term durability is less proven, which makes buying from a seller with a straightforward return policy a sensible hedge. Owners should top off the charge before the season’s first use, store batteries indoors in moderate temperatures, and keep the spool cover clean. If you want the most established platform and a wheeled edger, look at the top two picks; if runtime and cutting speed top your list, this model competes hard.

4. 14″ Electric String Trimmer Cordless Battery Powered

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This 14-inch cordless trimmer is the value play for shoppers who want a wide cut and a long list of included accessories. The 14-inch cutting width covers more grass per pass than the 12-inch trimmers above, which means fewer laps around the yard and less time holding a running tool. The 800-watt brushless motor is rated at 20,000 rpm, and the 3-in-1 design covers trimming, edging, and a wheeled configuration with a support wheel plus an auxiliary handle for better balance.

The bundle is unusually complete for the category. Two 3,000 mAh 21V batteries are included along with eight replacement spools, and the listing states the two packs together support up to 100 minutes of work in rotation. Rotating packs is the right approach: run one down, swap, and keep the spent pack on the charger rather than stopping work entirely. The adjustable head angle helps on slopes and around obstacles, and the lightweight, wireless design is manageable for older users or anyone who wants less strain.

Setup and maintenance are straightforward. Charge both batteries fully, install a spool, attach the wheel and auxiliary handle, and set the head angle before you start. Check line length after each session, and replace spools when they run dry rather than forcing the motor to spin a bare head. Wipe grass clippings out of the spool housing, since packed debris is a common cause of feed failures.

The honest trade-off is track record This is a newer listing with a small owner base compared with the WORX and BLACK DECKER models so there is less real-world evidence about how the batteries and motor hold up after several seasons The claimed motor speed is also far above the rest of this group and very high rpm numbers do not automatically translate into better cutting in thick weeds technique and line diameter matter more If you want a wide 14-inch swath eight spare spools and two batteries at a budget price it is an attractive package If proven reliability and a shared battery platform matter more choose the WORX WG163 or the BLACK.

5. Worx 20V 10″ 2-in-1 Cordless String Trimmer

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The WORX WG154 sits at the compact end of this group, and that is precisely its appeal. At 4.2 pounds, it is the lightest trimmer on the list, which matters if you have a smaller yard, limited grip strength, or a route that involves carrying the tool over steps and around tight beds. The 10-inch cutting width is narrower than the 12- and 14-inch models here, but a narrower swath also draws less power, which can stretch runtime between charges.

Like its larger sibling, it converts from trimming to in-line edging in seconds, and the head rotates 180 degrees so you can choose a narrower cut for longer runtime or a wider cut for faster trimming. The automatic line-feed system advances line without bumping, so you keep working instead of stopping to tap the head. An adjustable flower guard helps protect plants, lawn ornaments, and landscape features when you trim close to beds, and the auxiliary handle and long shaft improve reach and control along fences and hard-to-reach areas.

The cordless design eliminates gas, cords, and extension cables, making it easy to move around trees, fences, and tight spaces. It runs on the WORX 20V Power Share platform, and the included battery works with other WORX 20V tools plus select 40V and 80V WORX tools — a real advantage if you already own WORX equipment or plan to add a blower, hedge trimmer, or chainsaw to the same batteries.

The limitation is capacity, not quality. A 10-inch swath means more passes on a large lawn, and the lighter build is not intended for heavy overgrowth or brush clearing. If your property is measured in fractions of an acre and your trimming is mostly grass along edges, this is an easy tool to like. Compare it directly with the WG163: the 12-inch model includes a second battery and support wheels, which is the better value for most homeowners. Choose the WG154 when low weight and a smaller operating footprint outrank cut width. Maintain it the same way — clean spool, even line winding, batteries stored in moderate temperatures.

Buying Guide: Choosing the Best String Trimmer Under 150

Cutting Swath: 10, 12, or 14 Inches

Cutting swath is the width of the circle the spinning line sweeps, and it drives how fast you finish. A 10-inch trimmer is nimble and sips battery power, which suits small yards, tight beds, and anyone who tires quickly. A 12-inch swath is the sweet spot for most homeowners and appears on three of the five picks above. A 14-inch swath covers the most ground per pass, but it also demands more power from the motor and the battery, so wide cuts on a small battery can mean shorter runtime rather than shorter jobs.

Do not assume wider is automatically better. If your trimming consists of a few hundred feet of edging and some fence line, a 10- or 12-inch head will be easier to control around obstacles and less likely to scalp the lawn where the ground dips.

Voltage, Battery Capacity, and Platform Compatibility

Voltage gets most of the attention on cordless trimmer labels, but it is only one part of the power story. A 20V or 21V battery can deliver strong trimming performance when the motor and cutting head are matched to it, while a higher voltage number does not automatically mean better real-world results. The more useful question is whether the tool includes a battery and charger, how many batteries you get, and whether those batteries fit other tools you already own or plan to buy.

Amp-hour ratings and milliamp-hour ratings tell you more about runtime than raw voltage. A 2.0Ah battery pack generally provides less run time than a 4.0Ah pack under the same load, which is why models with two larger batteries can keep you working longer if you rotate them. The trade-off is weight and cost. Two 4.0Ah batteries add bulk compared with a single 2.0Ah pack, but they also reduce downtime. If you have a small yard, one battery may be enough. If you plan to trim, edge, and blow off the driveway in one session, two batteries are a practical advantage.

Platform compatibility matters for long-term value. The WORX models use the 20V Power Share system, and the included battery works with other WORX 20V tools plus select 40V and 80V WORX tools. That makes them appealing if you already own WORX equipment or want to build a collection around shared batteries. If you are starting fresh, look at the replacement battery price and availability before you buy. A trimmer is only useful while you can keep it powered.

Weight, Balance, and User Comfort

Weight affects how long you can trim comfortably and how precisely you can work around flower beds, fences, and trees. The supplied weights range from about 4.2 lbs for the Worx 10-inch model to 5.95 lbs for the 14-inch model. That difference sounds small on paper, but it becomes noticeable when you hold the trimmer away from your body for 20 or 30 minutes. Lighter tools are easier for seniors, smaller users, and anyone trimming overhead or on slopes.

Balance is just as important as total weight. A trimmer with a well-placed auxiliary handle and an adjustable shaft feels lighter than its scale weight because you are not fighting the tool. The BLACK+DECKER model includes an adjustable handle and height positions, while the 14-inch model adds an upgraded wheel and auxiliary handle for more balanced control. The WORX 12-inch model includes rubberized wheels that support and guide the edger, which can reduce fatigue when you edge along a long driveway.

Vibration is another comfort factor. The BLACK+DECKER listing specifically mentions reduced vibration, which can matter if you have wrist or hand fatigue. For most homeowners, the best approach is to choose the lightest tool that still has the cutting width and runtime you need. Do not assume heavier is stronger. In this category, heavier often means a larger battery, a wider cutting head, or added wheels rather than a more powerful motor.

Line Feed Systems and Trimmer Line

Line feed systems separate a frustrating trimmer from an easy one. Bump-feed heads require you to tap the spool on the ground to release more line. Automatic feed systems advance line without bumping, which keeps you moving. The BLACK+DECKER model uses an Automatic Feed Spool that feeds line when needed. The WORX 12-inch model uses a push-button command feed spool system for instant line feeding, and the 14-inch model offers both auto and manual feed modes. The Worx 10-inch model also uses an automatic line feed system.

Replacement spools are a real ownership cost, so check what comes in the box. The WORX 12-inch model includes free spools for life, which is unusual and genuinely useful if you plan to keep the trimmer for years. The 14-inch model includes eight replacement spools, which reduces the need to shop for refills early on. The BLACK+DECKER model uses its AFS system, so you will need to buy compatible replacement spools when the original runs out.

Line diameter matters too. The WORX 12-inch model uses 0.065-inch line, which is common for light-duty residential trimming. Thicker line can cut tougher grass, but it also puts more strain on the motor and may not fit every spool. Do not force a heavier line into a trimmer that was not designed for it. For routine grass, edging, and light weeds, the specified line is usually the best choice. When you replace line, wind it evenly and keep the spool clean. A poorly wound spool causes tangles, uneven feeding, and unnecessary frustration.

Trimming, Edging, and 2-in-1 or 3-in-1 Versatility

Most string trimmers in this price range focus on two jobs: trimming grass and edging along sidewalks, driveways, and beds. A 2-in-1 design converts from trimmer to edger in seconds, usually by rotating the head or attaching a guide. The WORX 12-inch model tilts the head 90 degrees and includes rubberized wheels to support the edger. The WORX 10-inch model rotates the head 180 degrees and includes a flower guard. The BLACK+DECKER model converts from trimmer to edger and is designed for quiet, easy starting without gas or cords.

The 14-inch model takes versatility a step further with a 3-in-1 design that includes a wheeled string trimmer mode. That wheel can help steady the tool and create straighter lines, but it also adds a part to assemble, clean, and store. If you edge regularly, a wheeled design can be helpful. If you mostly trim around obstacles, a lighter trimmer without wheels may be easier to maneuver.

Spacer guards and flower guards are worth understanding. They help prevent the line from damaging plants, lawn ornaments, and landscape features. They are not a license to trim aggressively against bark or fencing. Even with a guard, you should approach delicate areas slowly and keep the cutting head parallel to the ground or edge. None of these tools are brush cutters. They are designed for grass, light weeds, and edging, not saplings, dense brambles, or heavy overgrowth.

Runtime, Yard Size, and Battery Management

Runtime claims are best read as estimates, not guarantees. The 14-inch model is listed with two 3000mAh batteries and up to 100 minutes of total working time when used in rotation. The 14-inch model’s listing also describes 60 to 90 minutes of use for the 2 x 4.0Ah battery setup on the third-ranked model. Actual runtime depends on grass thickness, cutting width, line condition, and how often you trigger the head. Tall, wet, or dense grass drains batteries faster than light edging along a curb.

For a small yard, one battery may be plenty. For a medium yard, two batteries let you finish the job without waiting for a charge. If you already own batteries from a compatible platform, you may be able to buy a bare tool or use your existing packs, but the supplied data here focuses on kits that include batteries and chargers. Keep batteries out of extreme heat and avoid storing them fully depleted. Charge them before long jobs, and rotate packs so one battery does not carry all the wear.

Do not judge a trimmer by runtime alone. A 14-inch cutting swath can finish a lawn in fewer passes, which may offset a shorter run time. A 10-inch trimmer may run longer because it cuts a narrower path, but it takes more passes. Match the tool to your yard shape and your patience for recharging.

Setup, Maintenance, and Storage

Most cordless trimmers require minimal assembly: attach the guard, handle, wheels if included, and charge the battery. The 14-inch model requires pulling the line out to about 6 inches before initial use, according to its listing. The BLACK+DECKER model includes a wall-mountable charging base, which can simplify storage and keep the battery topped off. The 14-inch model has a detachable shaft for compact storage, a useful feature in crowded garages or sheds.

After each use, wipe grass and dirt from the cutting head and vents. Check the spool for tangled line and replace it when it runs low. A dull or worn line cuts less efficiently and drains battery faster. If the trimmer starts vibrating more than usual, stop and check the spool, guard, and line length. Store the tool indoors in a dry place, and keep the battery in moderate temperatures. Following the manual’s maintenance schedule is the simplest way to protect your investment.

Safety and Technique for Better Results

Wear eye protection, long pants, and closed-toe shoes when trimming. Remove stones, toys, and debris from the area before you start. Keep bystanders, pets, and children well away from the cutting path. Hold the trimmer with both hands when possible, and do not overreach. Let the tip of the line do the cutting rather than forcing the head into thick grass. For edging, move steadily along the line you want to create and avoid pressing the head hard against concrete or asphalt.

Trim when the grass is dry if you can. Wet grass clumps, clogs the guard, and can make the tool harder to control. If you need to trim tall grass, make more than one pass rather than trying to cut everything at once. That approach reduces strain on the motor and battery and produces a cleaner finish.

Value, Warranty, and Long-Term Ownership

Value under this budget is not just the purchase price. It includes the battery, charger, replacement spools, and how long the tool stays supported. A model with free spools for life can save money over several seasons. A model with two batteries can save time. A model with a detachable shaft or wall-mount charger can save space. Before buying, check whether replacement batteries and spools are easy to find for the platform you choose.

If you already own tools from one battery family, staying in that family often makes the most sense. If you are starting from scratch, consider which brand you are likely to buy from again. A trimmer that shares batteries with a blower, hedge trimmer, or drill can be a better long-term purchase than a slightly cheaper standalone tool. The best choice is the one that fits your yard, your storage, and your willingness to maintain it.

FAQ: Best String Trimmer Under 150

What should I prioritize in the best string trimmer under 150?

Prioritize battery inclusion, cutting swath, weight, and replacement spool availability. A trimmer with a battery and charger is ready to use. A 12-inch swath suits most homeowners, while a 10-inch model is lighter and a 14-inch model covers more ground. Check whether the battery platform fits other tools you own or plan to buy.

Can a sub-$150 cordless trimmer handle thick weeds?

It can handle light to moderate weeds, especially with a fully charged battery and sharp, properly fed line. It is not designed for heavy brush, saplings, or dense overgrowth. For those jobs, use a brush cutter or a more powerful gas or high-voltage tool. For routine grass and edge cleanup, a cordless trimmer in this category is usually sufficient.

Is a 10-inch, 12-inch, or 14-inch cutting swath better?

A 10-inch swath is best for small yards and tight spaces. A 12-inch swath is the most balanced choice for typical residential trimming. A 14-inch swath covers more ground per pass but adds weight and can drain batteries faster. Choose based on yard size, obstacles, and how much time you want to spend trimming.

How long will the battery last on a budget trimmer?

Runtime varies by model, battery capacity, grass conditions, and technique. Some kits include two batteries and claim up to 60 to 100 minutes of total working time when rotated. Real-world results are often shorter in thick grass. Keeping a spare battery charged is the easiest way to avoid downtime.

Do I need a trimmer that converts to an edger?

If you maintain sidewalks, driveways, or bed edges, a 2-in-1 trimmer is worth it. It saves you from buying a separate edger and stores in the same space. If you only trim around fences and trees, a standard trimmer may be enough. Wheeled edger designs can help with straighter lines but add weight and assembly.

How do I maintain a cordless string trimmer so it lasts?

Clean the cutting head after each use, keep the spool properly wound, and replace worn line. Store the battery in a dry, moderate-temperature place and avoid leaving it fully depleted. Check the guard, handle, and wheels for loose parts. Following the manual’s maintenance steps will help the motor, battery, and feed system last longer.

Final Verdict

For most homeowners, the best string trimmer under 150 is the one that balances a comfortable weight, a practical cutting swath, reliable line feed, and a battery system you can live with. The WORX 20V 12-inch 2-in-1 model stands out as a well-rounded primary pick because it includes two batteries, converts to an edger, and offers free spools for life. The BLACK+DECKER 20V MAX is the clear alternative for buyers who want automatic line feed, reduced vibration, and a simple wall-mountable charging setup. If you prefer a lighter tool, a wider cut, or a wheeled design, the other options above cover those priorities. Match the trimmer to your yard, your storage, and your spare-battery habits, and it will serve you well for years.