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40V Lithium-Ion 4.0 Ah High Capacity Battery

$17900
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  • Works With All RYOBI 40-Volt Tools
  • Fade-Free Lithium-Ion Power
  • 4.0 Ah Battery for Increased Run Time
  • View More Details
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$17900

Product Overview

The RYOBI 40V 4.0 Ah Battery is the perfect addition to your RYOBI 40V collection. This 4.0 Ah battery gets 2X more runtime than the RYOBI 40V 2.0 Ah Compact Battery while delivering the same fade-free power and performance. All RYOBI 40 Volt batteries come with an on-board fuel gauge to display remaining runtime. This battery works with all RYOBI 40-Volt tools and chargers. Backed by a 3-year warranty, there's never been a better time to consider cordless.
  • Works with all RYOBI 40-Volt lithium-ion tools and chargers
  • 2X more runtime than the RYOBI 40V 2.0 Ah Compact Battery
  • Fade-free lithium-ion power
  • On-board fuel gauge displays remaining runtime
  • Charges in 40 minutes or less with the RYOBI 40V Rapid Charger (Model # OP406A, Internet SKU 312564301)
  • Charger Sold Separately
  • 3-Year Limited 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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BrandRYOBIRYOBIRYOBIRYOBI
Name40V Lithium-Ion 2.0 Ah Battery40V Lithium-Ion 4.0 Ah High Capacity Battery40V Lithium-Ion 5.0 Ah High Capacity Battery40V Lithium-Ion 7.5 Ah High Capacity Battery
Price
$13900
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$17900
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Save $50.00 (20%)
Ratings
(622)
(1167)
(2708)
(129)
Used with Equipment TypeBlower,Chainsaw,Cultivator/ Tiller,Edgers,Generator,Hedge Trimmer,Mower,Powerhead,Push Mower,Snow Blower,String Trimmer,TrimmerBlower,Brush Cutter,Chainsaw,Cultivator/ Tiller,Edgers,Generator,Hedge Trimmer,Mower,Powerhead,Push Mower,Snow Blower,String Trimmer,TrimmerBlower,Chainsaw,Edgers,Hedge Trimmer,Mower,Powerhead,Push Mower,Snow Blower,TrimmerBlower,Chainsaw,Hedge Trimmer,Mower,Powerhead,Push Mower,Snow Blower,String Trimmer,Trimmer
Fits ModelsWorks with all RYOBI 40-Volt lithium-ion toolsWorks with all RYOBI 40-Volt lithium-ion toolsWorks with all RYOBI 40-Volt lithium-ion toolsWorks with most RYOBI 40-Volt lithium-ion tools
Battery Amp Hours2.04.05.07.5
Voltage (volts)40 V40 V40 V40 V
Part TypeCordless BatteryCordless BatteryCordless BatteryCordless Battery
View ProductView ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)
6.5
Product Height (in.)
4
Product Width (in.)
3.25

Details

Battery Amp Hours
4.0
Fits Brands
RYOBI 40-Volt
Fits Models
Works with all RYOBI 40-Volt lithium-ion tools
Number of Batteries Included
1
Part Type
Cordless Battery
Returnable
90-Day
Used with Equipment Type
Blower,Brush Cutter,Chainsaw,Cultivator/ Tiller,Edgers,Generator,Hedge Trimmer,Mower,Powerhead,Push Mower,Snow Blower,String Trimmer,Trimmer
Voltage (volts)
40 V

Warranty / Certifications

Manufacturer Warranty
3-Year Limited Warranty

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

  • 4.4
    out of 1,167 reviews
  • 88%recommend this product
Filter by:
Showing 1-10 of 1,167 reviews
battery will not charge less than a year ago
battery will not charge , less than 1 year, home depot is not interested nor is RYOBI,I CAN NOT GET ANY ANSWER FROM ETHER,I HAVE A BLOWER,DRILL, WEEDEATER, AND ALL I HEAR IS CRICKETS, I HAVE SPENT HUNDRED OF DOLLARS WITH THIS COMPANY AND NO RESPONSE.MW BATTERY IS A 40V 4AH SNEU19251D210412, OP40401 IF ANYONE CAN HELP I WILL SURE APPRECIATE.THANKS GARY
by
Response from RYOBIMay 4, 2022
Hello, Becks64 - We're very sorry that your battery is no longer charging! Will you please be looking for an email from us at Reviews@RYOBItools.com? Our batteries are backed by a 3-year limited warranty, and we'd be happy to help get this resolved! RYOBIOutdoorTools
    Love my Ryobi 40V System
    I have converted to using all Ryobi battery driven products around my home for garden, yard care, and power tools. I was sick of spending money on gasoline powered yard care tools for edging, trimming and hedge trimming that constantly broke down. Since moving to the Ryobi 40V system, i have not had to repair the drive system a single time. I have heard complaints about how long the batteries last on a single charge but i have not seen the problem. I have 1/2 acre with fences, raised beds, garden, driveway and roadway and I dge every week. It takes me 1-1/2 hours to complete all of it and i do it on a single charge. I have a second area that is 175 ft by 15 ft around a group of trees that must be done separately but even it is done on a single charge and it takes two passes to complete. I recharge my single battery between doing the main yard and the area around the trees, which takes about 1-1/2 hours. While the battery recharges i mow the rest of the yard. These new systems have saved me trips for gas, mixing gas and oil and the storage. And oh yes i have tried the 4 cycle engines too and they last just the same as the 2 cycle- no thanks! As long as you have access to a charging station, ie. you are not working out in the woods somewhere, this is the way to go. Recommend these to my brother who had rotator cuff surgery and he is super pleased. No more pulling stater ropes for gasoline engines and less risk of reinjuring his shoulder. I also use this system for my hedge trimmers, garden tiller, blower, and edger. The only way to go!
    by
    • Verified Purchase
    • Recommended
    One season battery
    The battery works great for the season, and then when you charge it in a few months, it won't charge. I can't afford to buy a new battery every spring!! I have a weed eater and blower. I guess I need to buy a new weed eater and blower that's battery will last as long as the warranty!!
    by
    Response from RYOBIApr 4, 2022
    Hello, Granna4 - We're sorry that your battery is not taking a charge anymore! Our batteries do carry a 3-year limited warranty, and we'd be happy to get this taken care of for you. Please be looking for an email from us at Reviews@RYOBItools.com. RYOBIOutdoorTools
      1 found this review helpful
      Ryobi 4ah battery
      [This review was collected as part of a promotion.] These 40v 4ah batteries work out great, have under 1/2 acre of land and can get a couple of trimming jobs done and when equipped with a Ryobi 300 watt 40v inverter you get power incase of power outages. With a 40v 4ah battery in the Ryobi 300w inverter can watch 65” TV, cable/internet box ( kids loss their minds) and DVD player for 2hrs and 55 mins. Total I have 4-4ah, 2-3ah, 3 2ah, 2-5ah and 4-6ah 40v volt batteries, and with todays new 40v quick chargers can charge a 6ah battery under 50 mins and less with other 40v batteries. So no more long waits to finish up yard work, I have yet had any issues with dead or non-charging batteries since switching over to 40v battery outdoor tools. I definitely would hands down recommend Ryobi 40v 4ah batteries and up, reliable, long lasting ( especially on early or early evening cooler days) and with the simple push of a button get battery level instantly.
      by
        • Recommended
        Power Upgrade
        [This review was collected as part of a promotion.] Got a Ryobi 4ah 40V lithium battery and quick charger as a gift ! Now I’ll have a reliable backup for my leaf blower to get my chores done fast. The Rapid Charger cuts recharging in half or better so there’s hardly any down time. Full charge on new battery took 52 minutes ! Amazing !
        by
          • Recommended
          Great but does not last longer
          [This review was collected as part of a promotion.] I have been using Ryobi products for over 3 years. However, I had bad luck with its cordless blower. I’m on to my second blower and 4th battery.
          by
            Good capacity, shows remaining charge
            I'm using this battery with the Ryobi 40V leaf blower and it holds a good amount of charge. The battery will also show the remaining charge when you press the button on the front face which is nice.
            by
              1 found this review helpful
              Garbage battery
              I bought this battery as replacement for the defective battery that came with the mower. Neither battery could completely mow my front yard which is small. Mowing a fifth of an acre should not take days to do. definitely ditching Ryobi products from now on.
              by
              Response from RYOBIOutdoorsJun 21, 2021
              Hello, EvilTiger77 - We are sorry that you're not pleased with the run time you're getting! Run time will vary depending on the 40V Mower you're using, as well as outdoor conditions. And it would be wonderful if we could speak to you, and see what we can do to improve your experience. If you would, please keep an eye on your inbox for an email from us at reviews@ryobitools.com. RYOBIOutdoorTools
                1 found this review helpful
                awesome 4ah Bettery for ryobi.
                Awesome battery. Made way better then older one of 40 volt. Same setup as old but newer is better. Bought it for the 40 volt power source pack. Will use on outdoors too. Charges fast and fits snug in power pack incase of power outages.
                by
                  • Recommended
                  Works great!
                  [This review was collected as part of a promotion.] I bought my Ryobi lawn mower and battery a month ago. Love the ease of mowing. Battery runs for a minimum of 50 minutes. Charge it up and its ready to go for the next mowing. Very satisfied.
                  by
                  • Verified Purchase
                  • Recommended
                  Showing 1-10 of 1,167 reviews