40V 2AH Lithium-ion Battery

Model: #OP4020A

4.6 | 176 Reviews
Compatible with all RYOBI 40V Lithium tools and chargers, the 40V 2.0 AH Lithium-ion Battery is the perfect addition to your RYOBI 40V tool collection. It's lithium-ion cells deliver fade-free performance from start to finish. The convenient on-board battery life indicator keeps you informed while you're out in the yard tackling your landscaping jobs. The 40V 2.0 AH Lithium-ion Battery's compact lightweight design is perfect for strenuous landscaping tasks like hedge trimming, pruning and trimming. RYOBI 40V Lithium surrenders nothing but gas.


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  • Voltage: 40
  • Amp Hours: 2.0
  • Cell Type: Lithium-ion
  • Compatibility: All RYOBI 40V Lithium Tools & Chargers
  • Weight: 2.5 lbs.
  • Warranty: 3 Year Limited


  • 40V 2.0 AH Lithium-ion Battery
  • Operator's Manual


40V 2AH Lithium-ion Battery
40V 2AH Lithium-ion Battery is rated 4.6 out of 5 by 176.
Rated 5 out of 5 by from Job Finished on Time! Last Fathers day my wife bought me a Ryobi push mower and it came with a 40V 4.0 AH battery. My yard is fairly large and I was worried that the battery would not last for the entire yard. When the grass wasn't high I could just barely get the yard completed. When it's high, the battery would run out and I would not be able to finish the job. Purchased this 2.0 AH battery to help finish the job, and it enabled me to do just that. Was well worth the investment. Now using both batteries, I do not need to charge them both after each mowing and thus helping to extend both of their lives a bit more.
Date published: 2019-06-17
Rated 4 out of 5 by from Good but not quite an hour runtime I bought the RYOBI 14 IN CHAIN SAW WITH BATTERY AND CHARGER and It is a great saw. Cuts like a gas powered saw and the chain is excellent. My only gripe is you have to buy the chain from Ryobi parts dept and get charged more for shipping and handling than what the chain costs. You should be able to buy this chain at home depot who carries the Ryobi brand. Oregon does not make a chain that fits this saw (yet). Be careful buying a chain that looks compatible but is not. The book says you have to buy their chain. Do your research. The cbattery holds up pretty good but not for an hour. Charges quick though and the charge indicator on the battery is a great feature. I would highly recommend this saw.
Date published: 2019-08-19
Rated 5 out of 5 by from Just enough I bought the 2.0 AH, not realizing for just a little more I could have gotten a 4.0 AH or 5.0 AH. The 2.0 does everything it is supposed to do, but I would recommend paying a little more and getting the higher AH so that you have more battery run time. I went back and purchased the 5.0 AH and the 2.0 allows me run time anytime I am recharging my 5.0 battery, so everything is good. One thing to remember is that the 5.0 AH weighs more, so if you are just doing small jobs and prefer not having to hold up more weight, the 2.0 AH will be perfect.
Date published: 2019-08-15
Rated 5 out of 5 by from Good life I purchased this battery about a month ago. I was looking for a 2.6 AH battery to match the one that came on my Ryobi String Trimmer, but decided on this one instead. It has good life, as I have used it on my string trimmer as well as my Ryobi Blower and it held up for approximately an hour with no problem. It was run almost constantly during that hour. At the end of that time it was on it's last life indicator, but it did the job. If you have a normal house that sits on a half or quarter acre this battery should handle your needs.
Date published: 2019-09-16
Rated 5 out of 5 by from Good Power I have plenty of Ryobi 18v tools and batteries. This was for my 1st venture into Ryobi 40v tools. I bought a 40v chainsaw and a 40v pole trimmer. Since cutting down branches and smaller tress take some time, the 1 battery that came with the tool wouldn't last for the whole job. I bought 2 extra 40v batteries so I'd always have power. When 1 runs out, I can put it on the charger while using the others. This provides plenty of power, though not as long as the larger ones, but works great.
Date published: 2020-02-16
Rated 5 out of 5 by from Great Batteries I bought this battery to replace the 6 year old 2.4 AH battery that came with my trimmer. I made the mistake last year of seeing how that battery would work in my Ryobi lawn mower. It did not work for long and as a result it would shut down with my other tools with the indicator lights showing still half full. The new battery is much lighter and performs as expected in my trimmer, hedge trimmer & blower. I have two 5 AH batteries for my mower and I am very impressed and happy with the Ryobi Line of 40v batteries and tools.
Date published: 2020-06-17
Rated 5 out of 5 by from Good battery life This battery was included with the Ryobi electric lawn mower that I purchased a month ago. The mower is great. I wasn't sure the battery would last for the entire yard and I was right. However, it does last long enough to finish about 75%. It's way more than I thought it would be though. I bought a smaller A/hr battery to finish the job, so it's all good here. I really like the Ryobi line and am planning on more pieces. Definitely gonna get another of the bigger batteries.
Date published: 2019-05-05
Rated 5 out of 5 by from Been Great!! I bought both the blower and the trimmer and each cane with one battery. The blower uses up the battery much faster than the trimmer. I’m glad I have 2 batteries. I’d use one while the other is charging. I wish one tool came with two. But overall I’m satisfied with the average length of charge. Also I like how they don’t make the tool heavy. My wife’s able to use them with ease.
Date published: 2019-08-02
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