Best Greenworks 40V 16 in Cordless String
As an Amazon Associate we earn from qualifying purchases.
Is the best greenworks 40v 16 in cordless string trimmer a good fit for edging and trimming around a yard? The stored listing for this ASIN describes a tool-only Greenworks 40V string trimmer with a 16-inch cutting width, a brushless motor and a dual line bump feed head. The battery and charger are not included, and the stored record gives no runtime. This page covers that one product. It draws on the stored listing data and three university extension pages on trimmers and edging.
Quick answer
- It is a battery-powered, tool-only string trimmer with a 16-inch cutting width. The title says Tool Only, so the battery and charger are not in the box.
- The listing states a speed of 6000 rpm, two speed settings with a variable speed trigger, and a dual line bump feed head.
- The listing says one battery powers over 75 Greenworks 40V tools and names five attachments the trimmer is compatible with. It does not say whether any attachment comes in the box.
- The listing gives an item weight of 11.3 pounds and a 3 year manufacturer warranty field. It does not state a runtime.
The product at a glance
The table lists what the stored listing record states, from a Playwright scan dated 2026-10-23. Cells say “not stated” where the record is silent.
| Item | What the listing states |
|---|---|
| Brand | Greenworks |
| Full title | Greenworks 40V 16 in Cordless String Trimmer, Tool Only |
| Power source | Battery powered |
| Voltage and battery platform | 40V lithium-ion (bullet point); no voltage field in the record |
| Battery and charger | Not included (the title says Tool Only) |
| Cutting width | 16 inches |
| Speed | 6000 rpm |
| Line and head | Dual line bump feed head, 0.095-inch line (bullet point) |
| Speed control | 2-speed selection with a variable speed trigger |
| Motor | Brushless (bullet point) |
| Attachments | Compatible with PAC458 (edger), PAC459 (hedge), PAC460 (polesaw), PAC461 (cultivator) and PAC462 (blower) |
| Gas, oil and emissions | None, per the listing’s bullet point |
| Item weight | 11.3 pounds |
| Item dimensions | 65.35 in long by 11.81 in wide |
| Model number | ST40L03 |
| Warranty | 3 year manufacturer |
| Runtime | not stated |
| Battery capacity | not stated |
| Attachments in the box | not stated |
The listing page is the place to confirm the current details: View on Amazon
The listing also says the trimmer is 25% lighter than comparable gas-powered models. That comparison comes from the listing itself. None of the sources we opened check it, so treat it as the seller’s claim.
Read the table as a list of stated facts. A cell that says not stated means the stored record is silent on that point. It does not mean the trimmer lacks the feature, and it does not mean the feature is missing from the box.
Who it suits
This trimmer suits a homeowner who needs to edge and trim along sidewalks, driveways, flower beds and fence lines. The listing’s bullet about the 16-inch cutting width names those uses directly. The 16-inch width is the first number to check against the edges you actually maintain.
It also suits someone who already owns Greenworks 40V batteries and a charger and wants a trimmer without buying a second battery set. The listing says one battery powers over 75 Greenworks 40V tools. That is the listing’s own count, and nothing else in our sources supports it. The record does not state battery compatibility in plain terms, so confirm that the battery and charger you own are the ones this trimmer takes before you buy. If you want to compare a different battery platform, read our DEWALT 20V MAX brushless weed eater post, which covers a different tool.
Attachments matter if you want more than a trimmer. The listing says the unit is attachment capable and names five Greenworks attachments, including an edger, a hedge trimmer, a polesaw, a cultivator and a blower. Those are the same brand’s accessories, so the question is whether you already own one or plan to buy it. The record does not say whether any attachment comes in the box.
Safety comes first with any string trimmer. The Oklahoma State University Extension article on trimmers, edgers and blowers says that “They can be dangerous to operate, especially around gravel, trash and other debris in the yard.” It advises that “Wear protective clothing when operating a weeder, edger or trimmer.” It also says that “In addition, make sure children and pets aren’t in the area.” The Ohio State Extension factsheet on handheld trimmers adds that “Be aware of bystanders in the event of thrown objects.” It recommends safety glasses or goggles when using cutting attachments.
Edge quality is the reason many people reach for a trimmer after mowing. The Utah State University Extension page says that “Although it is more work, finished, neat edges can make a landscape look polished and attractive.” The same page notes that “Lawn areas may look green and lush, but if the edges are uneven or untrimmed, the whole yard can seem unkempt.” It also recommends designing beds so they need less edging and trimming in the first place, which is a planting decision that a trimmer cannot make for you.
The Ohio State factsheet’s safe-operation list includes three checks worth making before you start:
- Read the manual first. The factsheet says to “Always read and follow the manufacturer provided operator’s manual before using the equipment and any attachments.”
- Inspect the unit and any attachments for signs of wear and damage.
- Use attachments only as they were designed to be operated.
Skip it if
- You need a battery and charger in the box. The title says Tool Only, so neither comes with it. If you want a kit, look for one with the battery and charger listed.
- You need a runtime figure from the listing itself. The stored record states none, so check the battery’s own specifications before you buy.
- You trim mostly close to tree trunks, house trim, young plants or fences. The Oklahoma State article warns that these tools “can cause damage to tree trunks, landscape plants, house trim, fences and people,” and that “Trimming too close to these things can result in gouges in the surface.”
- You need a cutting width other than 16 inches. The record states only 16 inches.
- You want attachments included. The listing names five attachments but does not say whether any come in the box.
- You want a different battery platform, such as 60 volts. Our DEWALT FLEXVOLT 60V MAX string trimmer post covers that platform and does not describe this trimmer.
What the listing does not say
The stored record is useful but incomplete. This section lists the gaps, so you do not fill them with guesses.
- Battery and charger: not included, per the title. The record does not name a battery capacity, and the only battery detail is the bullet about 40V lithium-ion batteries powering over 75 Greenworks tools.
- Runtime: not stated anywhere in the record.
- Voltage: the record has no voltage field. The 40V figure comes from the bullet point and the title.
- Performance: the bullet says the trimmer “Powers through the toughest yards.” That is a general claim with no figure behind it in the record.
- Attachments: the listing names five attachments by model number but does not say whether any are included.
- Warranty: the record gives a 3 year manufacturer field but no terms, such as what the warranty covers.
- Model number: the record gives ST40L03. We could not open a Greenworks manufacturer page for that model, so the number rests on the listing alone.
How we chose
This post covers one product, ASIN B0BFB1F3JM, which is the item assigned to this keyword. It is a battery-powered string trimmer, a yard tool, so it belongs with the trimmers and edgers rather than with accessories or parts. The listing data comes from a stored Playwright scan dated 2026-10-23. We did not compare it with other trimmers in this post, because each post in this batch covers one ASIN.
We read the stored record field by field and did not fill a gap from memory or from another Greenworks model. The title and the cutting-width field both say 16 inches, so we used that figure once. The record has bullet points, so the feature facts come from them and the specification fields, and each fact is labelled with its source.
We added the Ohio State and Utah State extension pages for handheld trimmer safety and edging guidance, and the Oklahoma State page for protective clothing and bystander rules. They describe trimmers and edgers in general, not this model.
A Greenworks manufacturer page for this exact model was the source we most wanted, because it would have confirmed the model number and cutting width. We could not open one, so the model number and width rest on the stored listing alone. Each extension page was opened on the date shown in the source list at the end of this page, and the post uses them only for the points they make.
What we could not verify
The sources we opened do not cover the points below, and the listing record does not state them.
- The manufacturer page for model ST40L03. A request for the Greenworks 16-inch product page returned HTTP 403, so the model number and cutting width are not confirmed by the manufacturer.
- Battery and charger compatibility with the Greenworks 40V batteries you may own.
- The listing’s count of over 75 Greenworks 40V tools. We have no independent list to check it against.
- The 25% weight comparison with gas-powered models.
- Runtime and how long one battery lasts on a typical edging job.
- Whether any attachment comes in the box.
- How each attachment mounts on the shaft. The record names the attachments but does not explain the mounting, so check each attachment’s own listing before you order one.
- Whether the live listing still matches the stored scan dated 2026-10-23.
FAQ
Does the best greenworks 40v 16 in cordless string trimmer come with a battery and charger?
No. The title says Tool Only, and the stored record lists no battery or charger. Plan to buy both separately if you do not already have them, and confirm they are the right ones for this trimmer.
What cutting width does this trimmer have?
The listing states a 16-inch cutting width. The record has no other width figure, so the 16-inch number is the one to compare against the edges you need to trim.
Can it use attachments?
The listing says the trimmer is attachment capable and names five Greenworks attachments: an edger, a hedge trimmer, a polesaw, a cultivator and a blower. The record does not say whether any of them come in the box, so check the package contents before you buy. Check each attachment’s own listing as well, since the record does not explain how they mount.
How long does the battery last?
The stored record does not state a runtime or a battery capacity. Look at the battery you plan to use for its own run-time figure, and remember that edging and heavy trimming drain a battery faster than light cleanup.
Is it safe to use around children and pets?
Keep children and pets out of the work area, as the Oklahoma State extension article advises. The Ohio State factsheet adds that bystanders need to stay clear of thrown objects. Wear eye protection and protective clothing as well.
Is it lighter than a gas trimmer?
The listing says it is 25% lighter than comparable gas-powered models and gives an item weight of 11.3 pounds. The sources we opened do not check that comparison, so weigh the tool you plan to buy against a gas model you already know.
Bottom line
Choose this trimmer only if you already have a Greenworks 40V battery and charger confirmed to work with it, or you plan to buy them with the tool, and you need a 16-inch cut. If you need a battery in the box or a runtime figure from the listing itself, the stored record cannot give you either, so keep comparing listings.
Sources
- Greenworks 40V 16 in Cordless String Trimmer, Tool Only, Amazon listing, stored scan record (opened 2026-10-23) https://www.amazon.com/dp/B0BFB1F3JM
- Handheld Trimmers and Brush Cutters, Ohioline, Ohio State University Extension (opened 2026-10-22) https://ohioline.osu.edu/factsheet/aex-79037
- Beyond The Mower: Safe Use Of Trimmers, Edgers And Blowers, Oklahoma State University Extension (opened 2026-10-22) https://extension.okstate.edu/announcements/grow-gardening-columns/2025/august-24-2025.html
- Tips for Edging Your Lawn, Utah State University Extension (opened 2026-10-22) https://extension.usu.edu/archive/tips-for-edging-your-lawn
