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40V HP Brushless Whisper Series 17 in. Cordless Battery Carbon Fiber Shaft String Trimmer w/ 6.0 Ah Battery & Charger

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  • Includes high performance brushless motor for increased power
  • WHISPER SERIES: 60 percent Quieter Than Gas
  • Works with all RYOBI 40V Batteries
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Product Overview

The RYOBI 40-Volt HP 17 in. Carbon Fiber Shaft String Trimmer is the most powerful string trimmer RYOBI has ever made! To make it even more impressive it is 60% quieter than a gas string trimmer! As part of our WHISPER SERIES this tool was engineered to be both powerful and quiet. No more loud obnoxious gas motor ringing in your ear, just power and performance in your hands. Featuring a premium brushless motor that is directly mounted to the string head, a large cutting width and heavy duty .105 in. trimmer line we have created more power from a cordless string trimmer than we have ever before. The included REEL EASY+ 3-in-1 head (bump feed head, fixed line head, or bladed head) gives you increased versatility. With the included SPEED WINDER crank you can reload the REEL EASY+ head in less than 60 seconds. Other premium features include the carbon fiber shaft which provides greater durability and the variable speed trigger, a high low speed switch, and the adjustable 15 in. to 17 in. cutting width provide optimal power or runtime to meet your needs. This kit is equipped with a 40-Volt 6.0 Ah battery, and the included Rapid Charger charges your battery in under 60 minutes with 4X faster charging. The battery is compatible with the RYOBI 40-Volt system. The 40-Volt HP 17 in. Carbon Fiber Shaft String trimmer is backed by a 5-year tool warranty.
  • Brushless motor for maximum power and durability
  • WHISPER SERIES - 60% quieter than gas
  • Compatible with .105 in., .095 in., and .080 in. line
  • REEL EASY+ 3-in-1 bump feed, fixed line, and bladed head
  • REEL EASY+ bump feed head reloads in under 60 seconds with SPEED WINDER crank
  • Durable carbon fiber shaft
  • Variable speed trigger with 2 speed switch for more control
  • Adjustable 15 in. to 17 in. cutting width
  • Includes RYOBI 40-Volt 6.0 Ah battery and Rapid Charger
  • Rapid Charger for 4X faster charging, charges battery in under 60 minutes
  • Works with all RYOBI 40-Volt lithium batteries
  • 5-year tool warranty, 3-year battery warranty

  • volt, amp, string trimmer, mower, battery, cordless, electric, gas, 40. ryobi

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  • California residents

Additional Resources

From the Manufacturer

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40V HP Brushless Whisper Series 17 in. Cordless Battery Carbon Fiber Shaft String Trimmer w/ 6.0 Ah Battery & Charger

RYOBI 18V ONE+ HP and 40V HP Brushless Power Tools
The new 18V ONE+ HP & 40V HP Brushless Tools utilize Advanced Technologies and Superior Ergonomics to deliver High Performance tools and a Premium User Experience like never before. These tools are ideal for tough conditions.
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40V HP Brushless Whisper Series 17 in. Cordless Battery Carbon Fiber Shaft String Trimmer (Tool-Only)
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Exclusive40V HP Brushless Whisper Series 17 in. Cordless Battery Carbon Fiber Shaft String Trimmer w/ 6.0 Ah Battery & Charger
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Name40V HP Brushless Whisper Series 17 in. Cordless Battery Carbon Fiber Shaft String Trimmer (Tool-Only)40V HP Brushless Whisper Series 17 in. Cordless Battery Carbon Fiber Shaft String Trimmer w/ 6.0 Ah Battery & ChargerM18 FUEL 18V Lithium-Ion Brushless Cordless String Trimmer with QUIK-LOK Attachment Capability and 8.0 Ah Battery60V MAX Brushless Cordless Battery Powered Attachment Capable String Trimmer Kit, (1) FLEXVOLT 3Ah Battery and Charger
Voltage (v)40v40v18v60v
FeaturesAttachment Capable,Brushless,Precut Lines,Rechargeable,Zero EmissionsBrushless,Rechargeable,Zero EmissionsAdjustable Cutting Depth,Antivibration,Attachment Capable,Brushless,Rechargeable,Zero EmissionsAttachment Capable
Line Advance SystemBumpBumpBumpBump
Battery/ChargerTool Only(1) 6 Ah Battery & Charger Included(1) 8 Ah Battery & Charger Included(1) 3 Ah Battery & Charger Included
Power TypeCordlessCordlessCordlessCordless
Shaft TypeStraightStraightStraightStraight
Line Style Size.
Shaft Length (in.)50.55060 in45 in
Start TypeElectricElectricSwitchElectric
View ProductView ProductView ProductView Product



Assembled Depth (in.)35.31 inAssembled Height (in.)6 in
Assembled Width (in.)7 inLine Style Size.105
Maximum Cutting Path Diameter (in.)17Recommended Line Diameter (in.).105
Shaft Length (in.)50


Assembly RequiredYesBattery Amp Hours6 Ah
Battery TypeLithium IonBattery/Charger(1) 6 Ah Battery & Charger Included
Charger IncludedCharger IncludedFeaturesBrushless,Rechargeable,Zero Emissions
Head TypeWind without AssemblyIncludedBattery,Multiple Heads,No-tool Line Replacement,String
Line Advance SystemBumpNumber of Total Batteries Included1
Number of Trim Lines2Power TypeCordless
Product Weight (lb.)12.95 lbRefurbishedNo
Shaft TypeStraightStart TypeElectric
Tools IncludedString Trimmer,Trimmer LineTrimmer Line TypeString
Trimmer TypeHand HeldVoltage (v)40v

Warranty / Certifications

Manufacturer Warranty5-Year Limited Tool Warranty, 3-Year Limited Battery Warranty

Questions & Answers

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Customer Reviews

  • 4.7
    out of 103 reviews
  • 98%recommend this product
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Showing 1-10 of 103 reviews
[This review was collected as part of a promotion.] Once assembled, it has the power to decimate any weeds, thick grass, and tree chutes. It is the essence of “Gas like Power.” I love not having to worry about the gas and oil upkeep. This trimmer is great to clean up the edges of an unkempt yard to make it look fresh once again! The power boost switch is no joke :)
    • Recommended
    Robust and Powerful with a slight trigger delay
    This weedeater feels sturdy, very powerful and quiet, after pulling the trigger there is a slight delay but when the motor spins up, hang on, this RYOBI 40V HP Brushless 17" Carbon Fiber Shaft String Trimmer is claimed to be the most powerful model the company has ever made, plus the audible decibels are basically 50% more quieter than a gas string trimmer, and being apart of the WHISPER SERIES, this tool was engineered to be both powerful and quiet. Featuring a large cutting width and heavy duty .105" trimmer line, this device will trim grass anywhere, and includes multiple heads (bump feed head, fixed line head, or bladed head) which gives you increased versatility and backups incase you run out of trimmer line.  This kit comes with a 40V 6.0 Ah battery and a Rapid Charger, the only decision is if the price tag is adequate, but the 40V 6 amp-hour battery is adaptable to other 40V tools, so if you already own a couple, this may be just the new tool you need. As with most bump feed heads, the string line tends to stick and jam itself together, I am considering adding some gel type lubricant next time I string the head to test my theory or see if the sticking issue still persists. And the manual feed head is not bad either, you just need a pair of needle nose pliers to pull out the old lines.
    • Recommended
    Quiet, Powerful, Versatile
    Wow, this Ryobi 40V HP Brushless Whisper Series 17 inch Cordless Battery powered Trimmer with Carbon Fiber Shaft is what you need to tame any unruly yard growth. With the included heavy-duty string line included the SPEED WINDER that quickly reals in line onto the spool for dual length release. The included battery and charger can charge a drained battery to full in around an hour while regulating the battery temperature with onboard cooling fans. With a choice of fixed line or the bladed head attachment switching is quick and easy (easier with two hands but possible with one). When Ryobi says whisper quiet this trimmer wont wake the kids when used, but will deliver power directly to the head at the lead of the grip handle and easy squeeze trigger. Having a carbon fiber shaft keeps the overall weight of the trimmer reasonable even with the hefty battery installed adding the needed balance when in use. This trimmer can cut and dice with ease, and being a member of the 40V battery system this trimmer will quietly carve its way week after week of fresh growth.
    • Recommended
    1 found this review helpful
    Super lightweight!
    [This review was collected as part of a promotion.] Super lightweight and easy to use! Doesn't weigh you down like the gas weed eaters.
      • Recommended
      Good cordless trimmer
      Ryobi - RYOBI 40V HP Brushless Whisper Series 17 in. Cordless Battery Carbon Fiber Shaft String Trimmer w/ 6.0 Ah Battery & Charger. The trimmer came packaged well. The assembly was easy and quick. The unit comes with charger, battery, the traditional auto feed string head and a fixed line/blade head. Run time on the battery is good I have done my in town lot 2 times now on the same charge and still jas 4 bars on the battery. The shaft is carbon fiber so it does not weigh very much. Good trimmer
      • Recommended
      I have had my gas grass trimmer for years but lately it's been a little finicky so I opted for the battery powered. Ryobi produced a solid chainsaw 40v I own so the string trimmer I hoped the same results. For the most part I am very happy. There is tons of power with a low and high setting. Even on high fill throttle it is signifantly quieter than my gas trimmer. The different head attachments are quickly changed out for different needs like trimmer and edging or ripping through tall weeds and brush. My favorite part is how easy it is to reload the string into the trimmer. There is a handle that connects to the head. Just pull the string through the head until its even on both sides, then just crank the handle like a jack in the box.BOOM DONE. Seriously so easy and no string getting tied upside the head. Despite being a carbon fiber shaft , it is a little on the heavy side and by the time I am done by arm is relatively fatigued. The one thing I really do not like about the unit is the trimmer head screen. It us abnoxiously large. Over 2x the size of my gas model. Yes it provides more protection but it makes the head heavier PLUS it is very very hard to flip it over and edge my beds like I do with my gas model. You have to guess where the string is and where you are placing the trimmer. It cuts through anything and I can use it for 20 lins and barely use 1 cell on the battery. If it wasn't for being on the heavy side the trimmer guard being so large, it would he a perfect 5.
      • Recommended
      Very powerful, long battery life
      40 volt Ryobi cordless trimmer- My item was shipped to the house using FedEx and it arrived safely and undamaged. A quick note, if you live in a rea with porch pirates the bright green box will be very easy to spot so plan accordingly. I added several pictures to show what comes in the box and when its fully assembled. All you need is an allen wrench and it’s included with the parts. Assembly took 10 minutes, but I had a heck of a time tightening the bolt that secures the handle to the shaft. It basically seats as you tighten it, so until you tighten it the first time it is a bit short, you will understand once you install it. Second, the trimmer line guard, look at the instruction pictures, you have to slide it in straight, and it’s a bit of a pain to line up the holes for the two bolts. The only other parts are attaching the two parts of the shaft. I attached a picture. They align easy and use two Allen screws that have locktite installed. After that you are done. The shafts are carbon fiber which is designed to save weight, It also comes with a separate head and two brush blades to tackle serious weeds It comes with a 6ah 40volt battery and a very nice charger, the charger has a cooling fan installed that runs while it is charging. You will hear the fan so do not worry that anything is wrong. It automatically turn off once done. My battery arrived with 1 bar, it took just about 60 minutes to charge fully, so plan accordingly. Let me tell you a few things you may want to know when considering this purchase. First, this is not part of the Ryobi add-on line, this is a dedicated trimmer, the two shafts have electrical running between them to power the motor in the head. I thought the add-on option was kind of Ryobi’s thing, but not a show stopper. The unit itself when fully assembled is just over 5 feet long and cannot be taken apart easily for storage Much bigger than a corded trimmer, the battery is heavy and all together this thing weighs almost 13 pounds. I have a small yard, so no issue, but it may get tiring if using on a large piece of land. The battery has great run time, I didn’t even lose a bar doing a 50 x100 yard and trimming patio, etc. Using the Trimmer takes a bit of practice, for me at least, it is large and powerful and can easily take out your flowers or scar a tree if you’re not careful, the extra length takes a bit of getting used to. This is the whisper series, but an electric trimmer isn’t really noisy , I didn’t notice much difference in noise level. This unit is definitely capable of handling most yard work. I would have liked it to be a little smaller and also to accept other accessories. The battery and charger would cost almost the price of the whole unit so the value is there, overall this is a nice purchase.
      • Recommended
      7 found this review helpful
      Lots of power and battery lasts along time
      With Spring here I am excited to be out in the yard and not worry about a gummed-up carburetor of mixing oil with gas. I've been wanting to get a nice battery powered string trimmer and this 40V High Performance Whisper Series string trimmer does not disappoint. The assembly was a bit more difficult than I anticipated following the operator's manual it took about 30 minutes, and was missing a locking nut for the shaft coupler but fortunate to have an M5 locking nut around. The front handle should have been simple to assemble but took a bit of finessing and trimming of the rubber strips inside the band. The grass deflector went on easily. There is an included allen key used to tighten the bolts. Before starting assembly I put the 40V battery on the included rapid charger and it was fully charged by the time the string trimmer was assembled. The string trimmer features the standard rapid deployment string head that Ryobi calls Reel Easy that claims can be reloaded with .105" line in under 60 seconds. On the grass deflector is a cutting blade that automatically trims the string to the proper length and can be adjust between 15" and 17" by removing two screws and flipping the blade around. The string trimmer also comes with a seperate head to switch over to a flat bladed grass trimmer. With the battery attached the first thing I notice is how quiet and smooth the trimmer is with most all the sound coming from the twirling of the cutting line. The infinite adjustment of speed really helps control the cuts and accuracy desired. Located near the trigger lock on the rear handle is a speed switch that allows changing between a high and low, and found on the low setting had more control. One thing I really like about this string trimmer is it comes with the sleeker and lighter 40V - 6ah battery compared to the ones in my Ryobi self-propelled lawnmower, helping create a sleeker and lighter trimmer. Ryobi advertises the overall weight at 12.95 pounds but on my luggage scale found it about 2 pounds lighter. Even with the lightweight it would be nice if the string trimmer came with a shoulder sling to allow using for longer periods of time. During the weeding of the yard I barely used much battery, with four bars still remaining when done. Overall this is a nice, quiet trimmer with lots of power and long lasting battery, just wish assembly was a bit more simplified.
      • Recommended
      Great trimmer!
      The trimmer was fairly easy to put together.  It came with easy to follow instructions. This trimmer does have some weight to it. Wish it had a strap to help even out the weight. This trimmer is a beast though. Make sure you fully charge your battery and read the instructions on it. It has some nice safety features on it. We had alot of trimming to do and about 1.5 hour in it only used 1/2 of a full battery. I like that it comes with the option of using blades or string. Switching them out was easy. I wasn't  a fan of using it as an edger maybe I just need to get used to edging with it. But definitely a great trimmer! My yard looks better now!
      • Recommended
      Lightweight and powerful
      I have a competitor's string trimmer, but restringing is to hard on my hands. This comes with a speed winder which will make it easier to reload string. I really like that it came with plastic blades to make taking out tall stalky weeds out. Instructions are real through and easy to follow. The assembly tool is the only one you will need. Came with battery and charger, so it is ready to use. I have a RYOBI leaf blower and it works great, so I have added this string trimmer; and will definitely think about adding other garden tools.
      • Recommended
      Showing 1-10 of 103 reviews