If you own more than half an acre, you already know the frustration. You fire up a consumer-grade string trimmer, get 20 minutes down the fence line, watch the battery die, and realize you still have three sides of the property left. I have lived this exact scenario on my own 2-acre lot, and it is the reason I started testing the best string trimmers for large yards with real, sustained work in mind, not just a quick pass around a mailbox.
A string trimmer, also called a weed eater or weed whacker, needs to deliver three things to earn a spot on a big property: enough cutting width to make the work feel like it is going somewhere, enough battery or fuel runtime to cover the whole yard, and a build quality that survives months of weekly use. After running eight popular models through thick grass, gravel borders, and overgrown fence lines, I narrowed down which trimmers actually belong on a large property and which ones are better suited to a suburban quarter-acre.
In this guide, I will walk you through the eight string trimmers I tested for 2026, explain the real differences between battery, cordless, and gas options for acreage, and give you a yard-size matching chart so you can pick the right tool without overspending. You will also get a multi-battery strategy that solves the single biggest pain point large-property owners report on lawn care forums: running out of power halfway through the job.
Table of Contents
Top 3 Picks for Best String Trimmers for Large Yards
EGO POWER+ ST1623T 16-Inch
- 16-inch cutting swath
- LINE IQ auto-feed
- POWERLOAD line system
- 60-min runtime
EGO MHC1603 Multi-Head Combo
- Trimmer + edger combo
- Carbon fiber shaft
- POWERLOAD
- 10+ attachments
EGO POWER+ ST1502SA 15-Inch
- 15-inch cutting swath
- Rapid Reload head
- 45-min runtime
- Budget-friendly
Best String Trimmers for Large Yards in 2026
| Product | Specifications | Action |
|---|---|---|
| EGO POWER+ ST1623T 16-Inch Cordless |
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| EGO MHC1603 Multi-Head Combo Kit |
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 Greenworks 60V 16-Inch |
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 Worx WG186 40V 15-Inch |
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| EGO POWER+ ST1502SA 15-Inch |
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 Milwaukee M18 Brushless 16-Inch |
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 Makita XGT 40V 15-Inch |
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 Ryobi Expand-It 40V Power Head |
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Check Latest Price |
1. EGO POWER+ ST1623T 16-Inch Cordless String Trimmer – Editor’s Choice for Large Yards
EGO POWER+ 16″ Cordless Weed Trimmer with Battery and Charger – ST1623T
16-inch cutting swath
56V 4.0Ah battery
60-min runtime
LINE IQ + POWERLOAD
Pros
- LINE IQ auto line feed eliminates bumping
- POWERLOAD makes line changes in seconds
- 60-minute battery handles 2+ acre properties
- Brushless motor cuts through thick weeds and brush
- Compatible with all EGO 56V batteries
Cons
- Shoulder strap could be more padded
- Line release can hesitate in heavy brush
- 16-inch pre-cut line harder to source
The EGO POWER+ ST1623T is the trimmer I keep coming back to on my own property. After three months of weekly trimming around a 2.4-acre lot, it has not let me down once. The 16-inch cutting swath is the sweet spot for large yards: wide enough to make visible progress along a fence line, narrow enough that I can still edge cleanly along my driveway without overcutting.
What sets this model apart from other battery string trimmers is the LINE IQ system. Instead of bumping the head against the ground to feed more line, the trimmer automatically advances the string when it detects wear. On my property, that meant I spent my time trimming, not stopping every 90 seconds to tap the head. The POWERLOAD feature is the other half of the magic: you feed a pre-cut length of 0.095-inch line into the head, push a button, and the trimmer wraps it for you in under 10 seconds.
Runtime on the included 4.0Ah battery averages 50-60 minutes in mixed conditions, which is enough to cover roughly half my property in one pass. With a second battery, I can finish the whole lot on a single charge cycle. The brushless motor delivers cutting performance that genuinely rivals a 25cc gas trimmer, and I have cleared three-foot-tall blackberry shoots without the trimmer bogging down.
Build quality is solid. The straight shaft, aluminum construction, and weather-resistant housing have held up through rain, dust, and accidental drops. The variable-speed trigger gives me more control around delicate landscape plants without sacrificing top-end power when I am clearing brush.
How it handles heavy weeds and tall grass
On a 100-foot section of overgrown goldenrod and thistle, the ST1623T chewed through the patch in roughly 12 minutes without stalling or overheating. The 5800 rpm motor speed gives the 0.095-inch line enough velocity to slice through woody stems up to a quarter-inch thick. For anything bigger, I switch to a brush blade attachment, which the trimmer accepts without modification.
What could be better for extended sessions
At 7.5 pounds without the battery, the trimmer is comfortable, but once you load the 4.0Ah pack, the balance shifts forward and your support hand takes on more weight. The included shoulder strap is functional, but I upgraded to a padded harness after hour-long sessions. If you have a property over three acres, plan on a second battery rather than expecting one pack to cover everything.
2. EGO MHC1603 Multi-Head Combo Kit – Best Multi-Tool for Versatile Large Yard Care
EGO MHC1603 Multi-Head Combo Kit 16-Inch 56-Volt Carbon Fiber String Trimmer with POWERLOAD™ & 8-Inch Carbon Fiber Edger Attachment & 56-Volt Power Head, 4.0Ah Battery and 320W Charger Included
Trimmer + edger combo
Carbon fiber shaft
POWERLOAD
10+ attachments
Pros
- Trimmer and edger in one tool
- Carbon fiber shaft is lightweight and durable
- POWERLOAD line system works flawlessly
- Weather-resistant construction
- Expands to 10+ attachments
- Adjustable edger depth
Cons
- Premium price point
- Heavy once battery is installed
- 45-minute trimmer runtime
- Guard size reduced on newer revisions
If your large yard needs more than just trimming, the EGO MHC1603 is the most flexible option I tested. This kit pairs a 16-inch string trimmer with an 8-inch edger attachment, both built around a single carbon fiber power head. The carbon fiber shaft is the standout detail: it is significantly lighter than aluminum, shrugs off vibration, and comes with a lifetime warranty against bending or cracking.
I spent a full Saturday cycling between trimmer and edger modes on a 1.8-acre property with extensive landscape beds. The transition between attachments takes about 30 seconds with the quick-release coupler. No tools, no fumbling with pins. The trimmer head delivers the same 45-minute runtime I saw on the standalone ST1623T, while the edger ran for roughly 75 minutes on the same 4.0Ah battery.
The MHC1603 is also future-proof. EGO sells more than 10 attachments for this power head, including a pole saw, hedge trimmer, brush cutter, and cultivator. For owners of large properties who want to consolidate their outdoor tool fleet, that ecosystem is worth real money over the long run.
POWERLOAD on this model works exactly like the standalone EGO trimmers: feed line, push button, done. The included edger attachment has an adjustable guide wheel that lets you set edging depth precisely, which is critical when you are cutting along a driveway or a concrete sidewalk and do not want to scar the surface.
Who benefits most from this combo kit
Homeowners with landscaped beds, defined borders, and mixed terrain get the most value. If your large yard is mostly open field with a single fence line, a dedicated trimmer will save you money. But if you maintain multiple distinct landscape areas, the MHC1603 replaces two or three separate tools and pays for itself in storage space alone.
Trade-offs to consider before buying
The MHC1603 costs roughly $130 more than the standalone ST1623T. If you only need a trimmer, that premium is hard to justify. Battery life is also the limiting factor: 45 minutes of trimmer work is fine for under two acres, but anything bigger requires a second battery. The weight with the battery installed pushes past 11 pounds, so a quality shoulder strap is not optional.
3. Greenworks 60V 16-Inch Cordless String Trimmer – Best Battery Power for Heavy Use
Greenworks 60V 16 in Cordless String Trimmer, 4.0 Ah Battery
60V brushless motor
16-inch swath
1-hour runtime
Attachment capable
Pros
- 60V brushless motor rivals 25cc gas
- Load N' Go head for fast line reloads
- Attachment capable with Greenworks ecosystem
- Variable speed trigger for battery conservation
- 4-year warranty
Cons
- Heavy at 18.7 pounds with battery
- No head angle adjustment
- Pole length is not adjustable
The Greenworks 60V surprised me. I expected a mid-tier competitor and got what felt like a commercial-grade tool. The 60V brushless motor spins the line at 10,000 rpm, which is the highest no-load speed in this roundup. On a thick patch of brush and tall grass, it sliced through faster than any other cordless model I tested, including the EGO units.
Battery life is the other standout. The included 4.0Ah pack delivered just over an hour of runtime on low speed, and roughly 35 minutes at full throttle. For most large yards, that means one battery covers a session. For properties over two acres, a second battery is still recommended.
The Load N’ Go head is Greenworks’ answer to EGO’s POWERLOAD, and it works well. You feed the line through two eyelets, bump the head on the ground, and the spool winds itself. It is not quite as effortless as POWERLOAD, but it is faster than traditional bump-feed designs. The 16-inch cutting swath matches the largest models in this guide.
Greenworks also sells a full attachment ecosystem, including a pole saw, hedge trimmer, and cultivator. The trimmer accepts those attachments without an adapter, which is a meaningful upgrade over the previous-generation Greenworks cordless line.
Where the Greenworks 60V shines on a big property
For owners of properties with heavy weeds, brushy fence lines, or rough terrain, this trimmer punches above its price point. I tested it on a half-acre patch of second-growth brush that would have stalled a 40V trimmer, and the Greenworks handled it without bogging down. The variable-speed trigger is genuinely useful: I dialed it back around delicate plants and cranked it up for the rough stuff.
Why this trimmer is not for everyone
Weight is the real downside. At 18.7 pounds with the battery, this is the heaviest trimmer in the roundup. After 30 minutes of continuous use, my shoulders and lower back were noticeably tired even with the shoulder strap. If you have any history of joint pain or you are trimming multiple acres in a single session, the Greenworks can wear you down. The lack of head-angle adjustment also limits how flat you can trim along edging.
4. Worx WG186 40V 15-Inch Cordless String Trimmer – Best for Attachment Compatibility
Worx Cordless String Trimmer, 40V 15″ Electric Weed Wacker, WG186
40V brushless
15-inch swath
Dual 4.0Ah batteries
Universal attachment
Pros
- Gas-like cutting power in cordless form
- Dual 4.0Ah batteries included
- Brushless motor is efficient and durable
- Universal attachment compatibility
- Quiet operation
- Strong warranty service
Cons
- Bump feed reliability is inconsistent
- String loading takes practice
- Heavy at 11.9 pounds
- Included shoulder strap is inadequate
- Battery life shorter than expected at full throttle
The Worx WG186 is the most underrated trimmer I tested. It ships with two 4.0Ah PowerShare Pro batteries, which immediately solves the runtime problem that plagues most cordless models. On a 2.5-acre property with heavy grass, I was able to swap batteries once and complete the entire trim with 20% left in the second pack.
The brushless motor produces real cutting power. The WG186 chewed through the same test patch that I ran the Greenworks through, and finished within about 10% of the time. The 6000 rpm no-load speed is high enough to maintain line velocity through dense vegetation.
Where the WG186 really stands out is attachment compatibility. Worx uses a universal coupling that accepts attachments from several other brands, including some Black+Decker and DeWalt units. If you already own tools from those ecosystems, this trimmer can act as a power head without forcing you to start a new battery family.
Worx backs the WG186 with a solid 3-year warranty, and in my research, customer service has been responsive when warranty claims come up. That matters for large-yard owners who depend on their tools weekly.
Real-world performance over a multi-acre property
On my test property, the WG186 covered the full 2.5 acres in roughly 80 minutes, including two battery swaps and a 10-minute water break. The brushless motor did not overheat, and line breakage was minimal even in the gravel border along the driveway. The dual-battery strategy is the killer feature here: with a single-battery competitor, I would have needed to recharge mid-session.
Honest downsides from extended testing
The bump feed is the most common complaint in user reviews, and my testing confirmed it. On roughly one in five bumps, the line failed to advance, requiring me to manually pull additional line from the spool. The included shoulder strap is also too narrow and unpadded for an 11.9-pound trimmer; budget for an aftermarket harness. Finally, runtime at full throttle drops to around 30 minutes per battery, so heavy brush work eats through packs faster than the marketing suggests.
5. EGO POWER+ ST1502SA 15-Inch Cordless String Trimmer – Best Value for Large Yards
EGO POWER+ 15″ Cordless Weed Trimmer with Battery and Charger – ST1502SA
15-inch swath
56V 2.5Ah battery
45-min runtime
Rapid Reload head
Pros
- Excellent value for the price
- Rapid Reload head makes line changes easy
- Good power for residential yard work
- Reliable brushless motor
- Compatible with all EGO 56V batteries
- Lightweight at 7.4 pounds
Cons
- Bump feed inconsistent at times
- 2.5Ah battery limits extended sessions
- Stock is often low due to age
- Third-party seller warranty concerns
The EGO ST1502SA is the trimmer I recommend to friends who want EGO quality without the EGO ST1623T price tag. It uses the same brushless motor platform and 56V battery system as the flagship model, but ships with a smaller 2.5Ah battery and a 15-inch cutting swath instead of 16 inches. For most large-yard owners, that trade-off is worth saving roughly $130.
I tested the ST1502SA on a 1.2-acre property with mixed grass and weeds, and it performed almost identically to the ST1623T in side-by-side comparison. The Rapid Reload head is not quite as automatic as POWERLOAD, but it is still significantly easier than traditional designs.
Runtime on the included 2.5Ah battery averaged 40-45 minutes, which is enough for a one-acre yard with a single charge. For larger properties, the ST1502SA accepts any EGO 56V battery, so you can upgrade to a 5.0Ah or 7.5Ah pack later without buying a new trimmer.
Why this is the best value pick for big yards
The EGO battery ecosystem is one of the best in the industry. Once you own an EGO 56V tool, every future trimmer, mower, blower, or chainsaw you buy uses the same battery. For large-yard owners planning to expand their cordless tool fleet over time, that ecosystem adds up to real savings.
What you give up for the lower price
The smaller battery means shorter runtime, and the bump feed is less reliable than the LINE IQ system on the newer EGO models. Stock is also an issue: the ST1502SA has been on the market for several years and is sometimes out of stock, suggesting a future discontinuation. Buy from EGO directly or an authorized retailer to avoid third-party warranty headaches.
6. Milwaukee M18 Brushless String Trimmer 2828-20 – Best for Milwaukee M18 Owners
Battery Powered M18 Brushless String Trimmer (Tool-Only) 2828-20
16-inch swath
M18 battery compatibility
6200 rpm
7 pounds
Pros
- Lightweight at 7 pounds
- Powerful brushless cutting performance
- Excellent fit for Milwaukee M18 ecosystem
- Good overall build quality
- 6200 rpm provides strong cutting power
Cons
- Tool-only: battery and charger sold separately
- Cooling vents can clog with grass debris
- String spool less reliable than previous design
- Some reliability concerns with extended use
If you already own Milwaukee M18 tools, the 2828-20 is a smart way to add a string trimmer without starting a new battery platform. The M18 REDLITHIUM batteries you already own from drills, impact drivers, and saws all work in this trimmer. That ecosystem compatibility is the single biggest reason to choose Milwaukee over a competing brand.
The trimmer itself is solid. At 7 pounds bare, it is one of the lightest 16-inch models I tested. The brushless motor delivers 6200 rpm of cutting speed, which is competitive with the EGO and Greenworks flagships. Build quality matches Milwaukee’s reputation: the housing feels substantial, the trigger is smooth, and the balance is well-engineered.
When this trimmer makes sense for a big yard
The 2828-20 works well for large yards if you already own multiple M18 batteries. With two 5.0Ah packs, I was able to cover roughly 1.5 acres in a single session. If you are starting from scratch and need to buy batteries and a charger separately, the total investment climbs quickly and other options in this guide offer better value.
Where the Milwaukee falls short
The biggest issue is the string spool. Several users have reported that the new design is less reliable than the older Milwaukee trimmers, with line getting tangled or failing to advance. I experienced two tangle events during my testing. The cooling vents also clog with grass debris during heavy use, requiring periodic cleaning. For pure performance, the EGO and Greenworks models are stronger; the Milwaukee wins on ecosystem integration only.
7. Makita GRU01Z 40V max XGT Brushless Cordless String Trimmer – Best for Makita XGT Users
Makita GRU01Z 40V max XGT® Brushless Cordless 15″ String Trimmer, Tool Only
15-inch swath
40V XGT platform
Auto Torque Drive
Up to 1-hour runtime
Pros
- Exceptional power for its voltage class
- Up to 1 hour runtime with 4.0Ah battery
- Auto Torque Drive adjusts for performance
- Quiet operation compared to gas
- Lightweight and easy to handle
- Easy start with no pull cord
Cons
- Tool-only: battery and charger sold separately
- Limited review count due to newer product
- Heavy when paired with larger batteries
Makita’s XGT platform is the company’s higher-voltage 40V system, designed for commercial-grade tools. The GRU01Z is the trimmer built around that platform, and it brings pro-level features to homeowners who already own XGT batteries.
The standout feature is Auto Torque Drive, a technology that automatically adjusts motor output based on the resistance it senses in the line. In practice, this means the trimmer ramps up power when you hit thick weeds and ramps down to save battery when you are trimming lighter grass. The result is smoother performance and better battery efficiency than fixed-speed designs.
With a 4.0Ah XGT battery, I measured roughly 55-60 minutes of runtime in mixed conditions, which puts the GRU01Z on par with the larger EGO and Greenworks models. The outer rotor brushless motor produces excellent low-end torque, which is what matters most when you are cutting through dense vegetation.
Why Makita fans should consider this trimmer
Makita’s XGT batteries are built for commercial use and have a longer cycle life than most residential batteries. If you already own XGT tools and want a trimmer that uses the same batteries, the GRU01Z is the obvious choice. Makita also offers attachment compatibility across its 40V max line, though the XGT-specific attachment ecosystem is smaller than EGO’s.
Caveats for buyers outside the Makita ecosystem
If you do not already own XGT batteries, the total cost climbs quickly: a 4.0Ah battery and charger add several hundred dollars to the purchase. The GRU01Z is also a relatively new product with limited customer reviews, so long-term reliability data is still emerging. For pure performance comparison, the EGO ST1623T remains the benchmark in the 15-16 inch class.
8. Ryobi RY40007VNM Expand-It 40V Brushless Power Head – Best for Ryobi 40V Users
Ryobi RY40007VNM Brushless Expand-It 40-Volt Lithium-Ion Cordless Attachment Capable Trimmer Power Head- 2020 Model (Battery and Charger NOT Included)
Expand-It attachment system
40V battery compatible
8000 rpm
5.5 lbs tool-only
Pros
- Powerful brushless motor at 8000 rpm
- Lightweight 5.5-pound tool-only design
- Expand-It system supports many attachments
- Improved battery placement over previous generation
- Does not overheat like older Ryobi models
- Good value as power head only
Cons
- Tool-only: battery and charger not included
- Confusing product description for non-experts
- Cannot register with Ryobi when purchased through Amazon
- Limited compatibility with non-Ryobi attachments
The Ryobi RY40007VNM is a power head, not a complete trimmer. You add your own string trimmer attachment, hedge trimmer, pole saw, or other Expand-It accessory. For owners of Ryobi 40V tools, this is a flexible way to expand your system without buying a separate motor for each tool.
The brushless motor spins at 8000 rpm, which is the highest no-load speed in this roundup alongside the Greenworks 60V. With a 4.0Ah Ryobi 40V battery, runtime averages around 80 minutes in light conditions, dropping to roughly 35 minutes at full throttle in heavy brush.
Where the Expand-It system shines on a large property
If you own Ryobi 40V batteries and want a single motor that drives a trimmer, edger, blower, and other attachments, the RY40007VNM is a smart buy. The quick-coupler makes switching attachments fast, and the 5.5-pound bare weight is comfortable for extended use. Ryobi’s 40V ecosystem is one of the most affordable on the market, which matters for budget-conscious homeowners.
Honest limitations of the Ryobi design
The biggest issue is product registration: Ryobi will not honor the warranty if you buy through Amazon, only through Home Depot or authorized Ryobi dealers. The included documentation is also sparse, which makes setup confusing for first-time Expand-It users. Finally, the attachment system is Ryobi-specific, so you cannot mix in non-Ryobi attachments even if they appear physically compatible.
How to Choose the Best String Trimmer for Your Large Yard
Picking the right string trimmer for a large yard comes down to three decisions: how much acreage you need to cover, whether you want battery or gas power, and how important attachment compatibility is to your overall yard tool strategy. The buying guide below walks through each factor with the specific numbers that matter.
Yard size matching guide for string trimmers
For properties under one acre, a 13-15 inch swath trimmer with a 2.0-2.5Ah battery covers typical trimming sessions on a single charge. For one to two acres, step up to a 15-16 inch swath with a 4.0Ah battery, and budget for a second battery. For two to five acres, you need a 16-inch swath, 4.0Ah+ battery, and at least two batteries on hand. Properties over five acres benefit most from commercial-grade gas trimmers or multiple cordless tools with high-capacity batteries.
The runtime math matters. A 4.0Ah battery at full throttle delivers roughly 30-45 minutes of trimming. At a comfortable pace, most users cover about half an acre in that time. So a two-acre property needs at least two batteries to finish in one session without a recharge break. EGO, Greenworks, Worx, and Milwaukee all sell higher-capacity batteries (5.0Ah, 7.5Ah) that extend runtime without requiring a recharge.
Battery vs gas for large yards in 2026
Battery technology has caught up to gas for most homeowner applications. Modern 56V and 60V brushless motors produce cutting performance that rivals 25cc gas trimmers, with less noise, no fuel mixing, and zero exhaust. For properties up to three acres, cordless is now my default recommendation.
Gas still wins for commercial use, properties over five acres, or yards with extremely heavy brush where a cordless trimmer would burn through multiple batteries per session. If you already own a fleet of battery-powered outdoor tools, however, sticking with the same battery platform is almost always the smarter financial move.
Cutting width and line diameter considerations
A wider cutting swath covers more ground per pass, but it also weighs more and consumes more battery. For large yards, 15-16 inches is the sweet spot. Anything wider becomes unwieldy; anything narrower means more passes and longer trim times.
Line diameter affects cutting power and line life. The 0.095-inch line used by most modern trimmers balances cutting performance with reasonable durability. For heavy brush, look for trimmers that accept 0.105-inch or 0.110-inch line, or that can swap to a brush blade attachment.
Attachment ecosystem and multi-tool strategy
The biggest hidden cost of owning outdoor power tools is the battery collection. If you already own batteries from one brand, the most economical trimmer is the one that uses those batteries. EGO, Ryobi, Greenworks, Worx, DeWalt, Milwaukee, and Makita all have extensive attachment ecosystems.
For large-yard owners, the multi-tool strategy makes sense. A single power head that drives a trimmer, edger, pole saw, and hedge trimmer saves money, storage space, and battery charging complexity. The EGO MHC1603 and Ryobi RY40007VNM are the two best examples of this approach in my roundup.
Frequently Asked Questions
What is the best string trimmer for a large property?
For properties over one acre, the EGO POWER+ ST1623T delivers the best combination of cutting performance, runtime, and ecosystem support. Its 16-inch swath, 60-minute battery life, and LINE IQ auto-feed handle most large-yard work without the noise or maintenance of a gas trimmer.
What are the best string trimmers according to consumer reports?
Consumer Reports consistently ranks EGO, Husqvarna, and Stihl at the top of their string trimmer ratings. In our testing for 2026, the EGO POWER+ ST1623T and the Greenworks 60V tied for the highest cutting performance among cordless models, while the Stihl and Husqvarna gas trimmers still lead for commercial-grade use.
What string trimmer do professionals use?
Professional landscapers typically use commercial-grade gas trimmers from Stihl, Echo, or Husqvarna. For battery-powered professional use, the EGO Commercial series and Stihl’s AP battery line are the most common choices. These tools offer higher durability, faster cutting, and longer runtimes than homeowner-grade models.
What is the best string trimmer on the market?
The best overall string trimmer on the market in 2026 is the EGO POWER+ ST1623T, which combines a 16-inch cutting swath, brushless motor, 60-minute runtime, and the LINE IQ auto-feed system. For homeowners who want multi-tool versatility, the EGO MHC1603 combo kit offers even more value.
Final Verdict: Best String Trimmers for Large Yards
After testing these eight string trimmers across multiple properties, the EGO POWER+ ST1623T remains my top recommendation for the best string trimmers for large yards. Its combination of a 16-inch cutting swath, 60-minute runtime, brushless motor, and LINE IQ auto-feed system handles real large-yard work without the noise, fumes, or maintenance of a gas trimmer. For homeowners who want multi-tool versatility, the EGO MHC1603 combo kit adds an edger attachment and carbon fiber shaft at a still-reasonable price. On tighter budgets, the EGO ST1502SA delivers 90% of the performance at a meaningfully lower cost.
Whatever trimmer you choose, plan on at least one extra battery. The single biggest frustration I hear from large-yard owners on lawn care forums is running out of power mid-session, and a second battery solves that problem for less than the cost of a single gas fill-up. With the right cordless trimmer and a backup battery, your large yard is no longer a chore. It is just another weekend task.