Model: #OP4050A

4.6 | 531 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 529.
Rated 5 out of 5 by from Runs my chainsaw just fine. Came as part of my 18" chainsaw kit. No issues with the battery at all. Just wish they cost less as I'd like to get at least one extra.
Date published: 2023-02-11
Rated 5 out of 5 by from It’s like a full gas tank I bought this with a new 18” chainsaw. It works great. It does seem to heat up and protect itself when cutting through very large trees. But, just let it rest and you can use up the r3st of the stored power.
Date published: 2023-02-09
Rated 5 out of 5 by from Great feature Works good have no problem with cutting trees lots of power
Date published: 2023-02-05
Rated 5 out of 5 by from longer lasting power charge last longer can get more done without having to change battery as often
Date published: 2023-01-28
Rated 5 out of 5 by from Made very well Received it as a Christmas gift with a chain saw and was amazed at the power it had.
Date published: 2023-01-21
Rated 5 out of 5 by from Great Battery Nice battery with plenty of power. Run time as expected
Date published: 2023-01-17
Rated 5 out of 5 by from Power Received this for a Christmas present to add to my RYOBI set. Great product. Happy to use battery power.
Date published: 2023-01-01
Rated 4 out of 5 by from middle of the road 40v battery not the biggest out there, but larger than the 2ah 40v that we already had. purchased to use with a ryobi snowblower. used half of the battery in a bout 10 minutes of clearing about 1" of powder.
Date published: 2022-12-27
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