#1 Home Improvement Retailer

ONE+ HP 18V Brushless Whisper Series 15 in. Cordless Battery String Trimmer with 6.0 Ah Battery and Charger

Apply Now
Pay $224.00 $249 when you open a new card. info
Apply for a Home Depot Consumer Card
  • Includes High Performance Brushless Motor for Increased Power
  • WHISPER SERIES - Our quietest range of products
  • Over 260 ONE+ Tools – All Work With Any RYOBI ONE+ 18V Battery
  • View More Details
0 in stock
Text to Me
How to Get It

Frequently Bought Together


Product Overview

The RYOBI 18V ONE+ HP 15 in. String Trimmer truly harnesses the power of 18V ONE+. It has a brushless motor for maximum power and durability and as part of our WHISPER SERIES it is among our quietest range of products giving you the power without the hassle of noise. This trimmer is equipped with the REEL EASY+ bump feed Head with SPEED WINDER crank which can be reloaded in 60-seconds or less. The variable speed trigger and 2-speed switch deliver increased control for any application. The adjustable 13 in. to 15 in. cutting width allows you to optimize your trimmer for increased runtime or a wider cutting width. This lightweight and well-balanced design also has a front handle for comfort and the trimmer is equipped with a 6.0 Ah battery for extended runtime. The battery is compatible with the RYOBI 18V ONE+ system. Backed by a 3-year warranty.
  • Brushless motor for maximum power and durability
  • WHISPER SERIES: our quietest range of products
  • REEL EASY+ bump feed head with speed winder crank for fast and simple reloading
  • Variable speed trigger with 2-speed switch for more control
  • Compatible with 0.080 in. and 0.095 in. line
  • Adjustable 13 in. to 15 in. cutting width
  • Includes RYOBI 18V 6.0 Ah battery and 18V charger
  • Works with all RYOBI ONE+ 18V batteries
  • 3-year warranty

  • California residents

Additional Resources

From the Manufacturer

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Compare Similar Cordless String Trimmers

NewONE+ HP 18V Brushless Attachment Capable String Trimmer w/ Extra 5-Pack Pre-Cut Spiral Line, 6.0Ah Battery & Charger
current product
ONE+ HP 18V Brushless Whisper Series 15 in. Cordless Battery String Trimmer with 6.0 Ah Battery and Charger
Exclusive40V HP Brushless 15 in. Cordless Carbon Fiber Shaft Attachment Capable String Trimmer with 4.0 Ah Battery and ChargerNewONE+ HP 18V Brushless Whisper Series String Trimmer w/ Extra 5-Pack Pre-Cut Spiral Line, 6.0Ah Battery & Charger
NameONE+ HP 18V Brushless Attachment Capable String Trimmer w/ Extra 5-Pack Pre-Cut Spiral Line, 6.0Ah Battery & ChargerONE+ HP 18V Brushless Whisper Series 15 in. Cordless Battery String Trimmer with 6.0 Ah Battery and Charger40V HP Brushless 15 in. Cordless Carbon Fiber Shaft Attachment Capable String Trimmer with 4.0 Ah Battery and ChargerONE+ HP 18V Brushless Whisper Series String Trimmer w/ Extra 5-Pack Pre-Cut Spiral Line, 6.0Ah Battery & Charger
Voltage (v)18v18v40v18v
FeaturesAttachment Capable,Brushless,Rechargeable,Zero EmissionsBrushless,Rechargeable,Zero EmissionsAttachment Capable,Brushless,Edger Conversion Capable,Precut Lines,Rechargeable,Zero EmissionsBrushless,Rechargeable,Zero Emissions
Line Advance SystemBumpBumpBumpBump
Battery/Charger(1) 6 Ah Battery & Charger Included(1) 6 Ah Battery & Charger Included(1) 4 Ah Battery & Charger Included(1) 6 Ah Battery & Charger Included
Shaft TypeStraightStraightStraightStraight
Power TypeCordlessCordlessCordlessCordless
Line Style Size.
Shaft Length (in.)44 in43.550.543.5 in
Battery TypeLithium IonLithium IonLithium IonLithium Ion
View ProductView ProductView ProductView Product



Assembled Depth (in.)13 inAssembled Height (in.)67.5 in
Assembled Width (in.)9.5 inLine Style Size.080
Maximum Cutting Path Diameter (in.)15Recommended Line Diameter (in.).080
Shaft Length (in.)43.5


Assembly RequiredYesBattery Amp Hours6 Ah
Battery TypeLithium IonBattery/Charger(1) 6 Ah Battery & Charger Included
Charger IncludedCharger IncludedFeaturesBrushless,Rechargeable,Zero Emissions
Head TypeWind with AssemblyIncludedBattery,String
Line Advance SystemBumpNumber of Total Batteries Included1
Number of Trim Lines2Power TypeCordless
Product Weight (lb.)9.52 lbRefurbishedNo
Returnable30-DayShaft TypeStraight
Start TypeElectricTools IncludedString Trimmer,Trimmer Line
Trimmer Line TypeStringTrimmer TypeHand Held
Voltage (v)18v

Warranty / Certifications

Manufacturer Warranty3

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.7
    out of 31 reviews
  • 95%recommend this product
Filter by:
Showing 1-10 of 31 reviews
Great 15" Cordless weed whacker
15" 18V Cordless string trimmer with battery & charger. Easy assembly just an extra grip mount & debris shield takes a few minutes. I charged the battery while assembling the above. A great feature is the high/low power switch which allows less hi revs and extends battery/cutting time. Switch to High if need extra power for large weeds. Neat speed winder for string replacement. Brushless, high performance quiet motor. Variable speed trigger with good handle design. Sturdy straight shaft. Variable string cutting width 13 - 15"on a bump feed trimmer head. Perfect lawn tool.
  • Recommended
Works Well and Very Quiet!
I have been looking for a system of battery powered tools for a couple years. There are lots of them out there, but there is usually something about them that I didn’t like. The Ryobi One+ looks to be the one that meets my needs. Firstly, everything I needed came in the box. Very important when some items are very hard to find. The battery charger is well made and the functionality in combination with the battery is nicer than most. I also like the built LED displays that let you know how the charge is. The battery display is plenty bright to be seen in the sunlight. The included battery weighs 1.7 pounds and balances well when using the string trimmer. Our yard is not huge, so I doubt there will ever be a time that I won’t have enough charge to finish trimming. I have not refilled the string yet. From the instructions, it appears to be easy enough. I have used auto string feed and bump feeds. The bump feed on this model is working great, but I expect it will be a wear and maintenance item. So far I like everything about this tool. The two speed control was something I didn’t even know I needed but it simplifies cutting around more sensitive vegetation or my HVAC system. A flip of the speed switch and I get all the power I need to rip through overgrown areas. I did set the adjustable string length to the shorter one. With my smaller yard, it’s working well. Another bonus I didn’t expect is just how quiet this tool is. I loathe the sound of gas powered tools and only use electric. The Ryobi Whisper really is exceptionally quiet without losing any performance. Bottom line, I can’t think of anything I don’t like about this tool.
  • Recommended
Ryobi 18V Whisper Series 15 in. Cordless Battery String Trimmer with Battery and Charger
I wanted a battery-operated string trimmer and since I have other Ryobi products it made it simple on my choices. I really like this one because it a lot quieter than other manufactures or models. As is state it give you the power without the noise. That I can vouch for. The unit has a feature “REEL EASY + bump feed head is easy to release a few inches from the reel when the string gets shorter. No need to stop the unit and pull the string out. It automatic and he has a cut off blade to have the correct length to maximum your cutting work. The trigger has a variable speed trigger and it also has a 2-speed switch selector that allows you to choose between the Low/High speeds. Using the low speed during the operation will help extend you battery run time. The High speed will improve power and performance. It comes with a Speed Winder crank which can help you reloaded the new string when the old one is used up. You can adjust the length of the string that comes from 13 in to 15 in by relocating the blade on the Grass Deflector cut off blade. There is some assemble required. You will need a screwdriver to assemble the Grass Deflector. It comes with a 3-year warranty.
  • Recommended
Powerful RYOBI String Trimmer
This beautifully-designed RYOBI 18-volt Battery-Powered String Trimmer uses the classic RYOBI ONE+ series battery. It came with the longer-lasting and powerful 6.0 Ah battery, but will accept any battery from the ONE+ series. A charger was also included. It is well-balanced but a bit on the heavy side (although the manufacturer designates it as lightweight). It could use a shoulder harness to take some of the weight off your arms. There is a handle for the other hand which easily adjusts to fit your preferences. It cuts fast and good and uses the traditional Bump-And-Feed mechanism to advance the string. A sliding 2-speed switch is near the start trigger.
  • Recommended
Works great!
After my previous string trimmer gave up and died on me I had to look into getting a new one. Since I have had good experiences with Ryobi I decided to get the 15 inch Ryobi one+ hp 18v brushless whisper series cordless trimmer with a 6 ah batter and charger. It can trim either a 13 inch or 15 inch path depending on your needs simply by moving the cutting blade. I already have several batteries that I use for my other Ryobi tools and since they are all in the same system they are interchangeable. The battery is actually the high performance 6ah battery. I did like that the grass deflector has holes in it to allow air flow as well as see if your getting any build up. It comes with the plastic ring speed winder so you change strings very quickly. You just put a 10 ft long piece in and use the tool to wind it right up. Even with the larger battery this is so lightweight compared to the gas ones. With my shoulder that acts up this is definitely a bonus. This on is a bit large for trying to do a small yard but I am using it where we have several acres so it is perfect. Assembly was easy and only took a couple of minutes. A few screws and the shaft goes together as well as the handle and your done! The trimmer can use either .080 twisted line or .095 twisted line depending on your needs. It has a lockout button to keep it from accidently starting as well as a speed switch. The speed switch is handy for using a lower speed to conserve battery life. Though it also has a variable speed trigger so within each speed you still have a range of power. This one is a bump feed so if your used to an auto feeder this does take a few times to acclimate too. The only drawbacks are the size of the feed head makes cutting down low a bit difficult. Also I am 5-7 and in order to tilt it enough to angle it to cut lower I am hitting the battery with my elbow as the unit is so long. Somebody who is taller may not have this issue so I won’t knock it for that. Could just be an issue that as I use it more I will find a way to get around this. As with all Ryobi tools this one includes a 3 year warranty.
1 found this review helpful
Really quiet operation, wish it came with extra trimmer line
This is a member of the Ryobi One plus family of products. We have many of these and I like the interchangeable battery packs. This does come with a battery and charger, so even if you don't already have batteries, you can operate this without purchasing one. This is a full size (15") trimmer and it is super quiet. It is very convenient without the cord. I wish it came with one extra spool of trimmer line. It can be converted to a 3-in-1 trimmer head with a blade (accessory not included). Easy to operate, but relatively short battery life.
  • Recommended
A Line Trimmer that Starts Everytime
With the exception of power generators, I’ve given up on small gasoline engines. Lawn mowers, line trimmers, chain saws, hedge clippers, leaf blowers, etc. The EPA has put so many environmental regulations on these little engines that, unless you run them every day, the carburetors gum up and they won’t start when you want to use them. I’m tired of pulling on starter cords until my eyes bug out, and I’m too old for it. I have a battery powered electric lawn mower that starts every time I want to use it, and it doesn’t require mixing gas and 2-cycle oil, or pulling on a recoil starter. This Ryobi 15”-18-volt cordless string trimmer comes disassembled, but assembly is simple and easy. It is another cordless tool in the Ryobi line that uses the ubiquitous Ryobi 18-volt One+ battery, so first of all, there is no power cord to trip over or get tangled up in the tool. You get the trimmer, One+ battery, rewinder crank, and battery charger. The battery charger is the standard Ryobi charger not the 30-minute rapid charger. According to the literature the One+ HP technology delivers 6 times more power. The Brushless Whisper Series Motor provides more power, longer runtime, longer motor life, and is the quietest in the range of Ryobi products. The trimmer comes with a Grass Deflector which helps to protect the user from flying debris, a handle “overmold” that provides user comfort, and a lock out button that prevents accidental starting. The trimmer has a variable speed trigger for more control and a 2-speed switch for optimal power/runtime. It has a straight shaft for extended reach, and an adjustable front handle for comfort, balance and extended reach. The trimmer head is adjustable at 13”or 15” cutting width. The adjustable cutting width allows for increased runtime or wider cutting. The Real Easy+ Speed Winder Bump Feed Trimmer Head can be reloaded in under 60 seconds. It uses 0.080 twisted or 0.095 twisted line, which you can buy on a reel on in precut 10’ lengths. This Ryobi line trimmer is not too heavy, 7.48 lbs. with spool and line; it is easy to use and reload, works great and starts every time. For those of you to whom it might make a difference, the trimmer and the battery charger are made in Vietnam and the battery is made in China.
  • Recommended
Well built with good power
This does everything I need and easily hacks down my heaviest grass and weeds on the bank behind our home. It's on the heavy side compared with my old electric and other battery powered trimmer but the power is so much better for going into rougher material where the others struggled. This is the best 18V battery so this will handle my 1/4 acre lot easily. Edging takes some getting used to but it will do a nice job if you slow down. The fact that the battery also works in other Ryobi tools is nice and means that I have a spare if one should die in the middle of trimming. I also like how easy it is to add line without disassembling the head. I hate that about my other trimmers which take 10-20 minutes to add string and half the time it jams. Finally, it's quiet compared to many other trimmers especially the gas ones. No need for ear plugs. Overall, this is a winner!
  • Recommended
Newest Trimmer "WHISPER SERIES"
This grass trimmer is from the newest line of Ryobi 18-volt One + Tools. Labeling it as the "WHISPER SERIES" which I must admit, the noise of the cutting line does sound not as loud as a typical 18-volt trimmer. The advancement of the Whisper Series is attributed to the grass defection shield. The numerous 3/8" holes added to the deflector cuts down on the sound as it deflects sound away from the operator by approximately 50%. Comes with a toggle switch that the unit can be run on low or high cutting speed. The handy "SPEED WINDER" enables the operator to install the cutting line using a sure way to install with a minimum amount of time. The .080" cutting line protrudes from the cutting head at 180 degrees from each other or protrudes in two different outlets on the cutting head. Very well balanced for less fatigue when using.
  • Recommended
This is a High-Grade Trimmer
Of all of the string trimmers I have owned, or even looked at, this one is among highest grade. I would personally compare it to one of the motorized trimmers that professional lawn people use, except this one is battery operated and does not have the issues of a gasoline motor. The trimmer is fast when on full power. However, it has a High and Low power slide button as well as a variable speed trigger. I love the bump feed head which feeds line easily as well as the winding system for reloading line. The trimmer comes loaded with line, plus additional line, so I have not loaded new line yet. However, the instructions to load up to 10' of new line are straight forward and Ryobi even included a speed winder crank to put new line in. A 6.0 Ah battery, plus a charger, is included in the package. The 6 Ah will make the charge last for a very long time and the cut can be expanded from 13" to 15" by moving the grass deflector with cut-off blades, making a large cutting job smaller. The trimmer has a little weight to is, and is somewhat awkward at first because of the weight and length. The balance is great once the battery is installed, which makes the trimmer less awkward. All of my old trimmers had one piece of line coming out of the head. This trimmer has two pieces, which will make the cut faster and more complete. Another feature of this trimmer is the fact that so much of it is made of metal instead of plastic. Personally, I cannot say enough good things about this Ryobi 18V ONE String Trimmer. Assembly was a snap, and the trimmer is packed so well in the box that even though the box was a little bent down, there was zero damage inside. This is one of those tools that you have to get and see for yourself. It even has a hanging hook on the top to save storage space and make storing much easier. Highly recommended.
  • Recommended
Showing 1-10 of 31 reviews