Model: #OP4050A

4.6 | 514 Reviews
Compatible with all RYOBI 40V Lithium tools and chargers, the 40V 5.0 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 5.0 AH Lithium-ion Battery's extra cell capacity is perfect for higher output tools like 40V mowers, blowers and chain saws. RYOBI 40V Lithium surrenders nothing but gas.


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This product is covered by a 3-year limited warranty.

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  • Voltage: 40
  • Amp Hours: 5.0
  • Cell Type: Lithium-ion
  • Compatibility: All RYOBI 40V Lithium Tools & Chargers
  • Weight: 4 lbs.
  • Warranty: 3 Year Limited


  • 40V 5.0 AH Lithium-ion Battery
  • Operator's Manual


40V 5AH BATTERY is rated 4.6 out of 5 by 513.
Rated 5 out of 5 by from Awesome power and longevity This battery will mow and weed eat my 1/4 acre lot easy. Love it
Date published: 2022-09-07
Rated 1 out of 5 by from Returned Second use, battery made a smell and got hot, also an oily substance on some of the contacts. Took forever to cool enough to recharge, never worked right after that, returned saw and battery
Date published: 2022-08-08
Rated 5 out of 5 by from Great battery longer life than my older one Bought this a couple of weeks ago and love it. Will buy again
Date published: 2022-08-03
Rated 5 out of 5 by from Excellent Battery We have multiple Ryobi products and we are very happy with all of them. The batteries are easy to charge and hold up to all the landscaping use that we put them through. Customer service is always stellar as well. Highly recommend!
Date published: 2022-07-21
Rated 5 out of 5 by from Great price Used the new batt on my 40V ryobi lawnmower and did great
Date published: 2022-07-20
Rated 5 out of 5 by from Great battery!! This battery provides a good deal of run time for me. Very happy with it!
Date published: 2022-07-02
Rated 3 out of 5 by from disappointed with battery run time right out of the box chainsaw works great was not impressed with the battery run time I got about 6 cuts :(
Date published: 2022-06-28
Rated 5 out of 5 by from Great Battery I bought this battery to replace a 2.4 Ah 40 volt battery that was loosing its ability to hold a charge. It was 6 years old and I thought I'd gotten really good service out of it, so would get a new, bigger battery that would fit my Ryobi 6 year old lawnmower, this fits exactly, and easily mows my 1/3 acre lot.
Date published: 2022-06-24
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