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Model # OP4026A

Internet # 203161619

Store SKU # 836486

40-Volt Lithium-Ion Battery

This item has been discontinued.
The Home Depot no longer carries this specific product.

$99.00 /each




Model # OP4026A

Internet # 203161619

Store SKU # 836486

Power your Ryobi 40-Volt tools with this high capacity lithium-ion battery. It provides fade-free power and longer run time, whether you use it as a replacement or a spare battery. Use with the 40-Volt Charger to get a full charge in less than two hours. 3-year warranty.

California residents: see  Proposition 65 information

  • Replacement back up battery for Ryobi 40-Volt lithium-ion tools
  • Fade-free power
  • Increased run time
  • Quick charging in less than 2 hours

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Fits brands 
RYOBI 40-Volt 
Fits models 
Works with all RYOBI 40-Volt lithium-ion tools 
Part Type 
Cordless Battery 
Used with equipment type 
String Trimmer 
Warranty / Certifications
Manufacturer Warranty 
Limited 3 Year Warranty 


Rated 3.9 out of 5 by 90 reviewers.
Rated 2.0 out of 5.0 by Don't get too excited As much as I love the Ryobi lineup of 40v tools (I have several) the weakest link is the batteries themselves. I'm on my 3rd and 4th battery within 1 year. My first battery failed within 9 months, my 2nd battery failed in less than 90 days. Same symptoms, they show full charged, but will not operate any of my equipment. Ryobi customer service was not very helpful, and though I have seen other battery reviews with the same issues as mine, no service rep could comment. KEEP YOUR RECEIPT and register EVERY 40v Ryobi product you have, especially the batteries. This will simplify the return process which, for me, was a nightmare. June 16, 2015
Rated 5.0 out of 5.0 by Great rechargeable battery These rechargeable batteries are easy to pop in and great for the light to moderate amount of yard work I do. I love not having to mess with gas engines or extension cords. I have purchased several different Ryobi products with rechargeable batteries and am very happy with all of them. One thing I like about the Ryobi system is that some of their products use the same battery so you only have to buy one charger. This particular battery runs both the Ryobi string trimmer/edger and a Ryobi lawnmower, and I've used it in both of them for up to an hour before it needed recharging. Since I have 2 of these batteries, at least one is always ready to use. September 29, 2015
Rated 2.0 out of 5.0 by Not sure it's worth the investment I now own both the Ryobi 4-stroke string trimmer power unit, and the 40V electric with 2 batteries. You have to be cautious with the electric about using a different head with more string, or heavier gauge, because it really sucks the life out of the battery quicker with any additional load. I hate the tap style heads, and use an aftermarket 4 line head that's easy to refill. Unfortunately, it cuts down on the battery life to run it. I may jump ship and try the Kobalt unit. I have 2 batteries and still can't trim our acre. It'll be interesting to see what the overall life is on these batteries. Also, the locking tab release position is HORRIBLE. July 21, 2015
Rated 3.0 out of 5.0 by Ryobi lithium ion battery prone to failure I have three (3) Ryobi cordless tools (Chain saw, a weed trimmer, and a blower). The batteries have a good working life, and allow me to perform a lot of work. But after 6 months, the batteries are defective and will not charge. There is supposed to be a warranty on the batteries, but to make a claim is too difficult. I just keep replacing the batteries. It is too costly, a large 40 volt Lithium ion Ryobi battery runs over $90 ..... I am in too deep with 3 Cordless Ryobi tools or I would just change brands and get new tools. Consider the battery expense and life expectancy when choosing your cordless tools. J Martinez September 29, 2015
Rated 5.0 out of 5.0 by Perfect for House with small yard, still need weedeater next ro fence. Zero problems, excellent Japan quality. As long as grass is 6 inches or shorter this item is excellent. For 6 inch dense grass, use higher height setting first, then lower. Sufficient power. But would not work on dense jungle of 10 inch grass -- too taxing on power. Excellent if you mow grass before 5 inches high. I have under 5000 sq ft of grass area. If you have 5000 sq ft or more, you may want two batteries for finishing in one go. If you have 6,000 to 10,000 sq ft or more and do not mow regularly, my guess is you are better off with gasoline powered lawn mower, might be too much for this item. November 13, 2015
Rated 2.0 out of 5.0 by Big bucks, poor quality I bought this battery because my original one died after 1-1/2 seasons of mowing a very small yard. Had to order online since none of the four stores in my area keep it in stock. I wish I had never bought the mower that uses this battery! October 20, 2015
Rated 4.0 out of 5.0 by It's a good battery but just wish it lasted longer than it does. I bought this one so now I have 2. I couldn't figure out how to get the battery off the weed wacker so I could charge it....after fighting with it for 15 minutes, checking the owner's manual which is sorely lacking for information, and breakiing a couple of fingernails I finally got the battery released and into the charger. That said, I am disappointed that the battery doesn't last longer. The manual said the weed wacker would do an acre and a half. I coulnd't even get through half of the 125 ft x app 15 ft along the street in front of my pasture. It took 3 charges of the original battery which is why I bought this one for a backup. April 21, 2015
Rated 5.0 out of 5.0 by larger capacity then stock the stock battery of 1500mha is short lived when there's work to be done.. this 2500mha last twice as long when clearing brush & small trees.. shame they don't sell this battery with the tool when we buy... March 24, 2015
  • 2015-11-26 T10:38:37.156-06:00
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