Model: #OP4075A

4.6 | 40 Reviews
If you have a large yard or need extra run time, the RYOBI 40V 7.5 Ah High Capacity Battery is the perfect addition to your RYOBI 40V collection. This 7.5 Ah battery gets 4X more runtime than the RYOBI 40-Volt 2.0 Ah Compact Battery while delivering the same fade-free power and performance. All RYOBI 40 Volt batteries are compatible with all RYOBI 40V Tools and come with an on-board fuel gauge to display remaining runtime. This battery works with select tools in the RYOBI 40-Volt collection, refer to the compatibility page for more information.


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

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  • Voltage: 40
  • Amp Hours: 7.5
  • Cell Type: Lithium-ion
  • Compatibility: Select RYOBI 40V Tools (see the compatibility page for more information)
  • Warranty: 3 Year Limited


  • 40V 7.5 AH Lithium-ion Battery
  • Operator's Manual


40V 7.5AH BATTERY is rated 4.7 out of 5 by 38.
Rated 1 out of 5 by from failed after 5-6-ueses 40v batt on chainsaw. Chainsaw is great, but battery is crap
Date published: 2023-02-27
Rated 5 out of 5 by from This battery is a BEAST! I bought two of these for my Ryobi Pole Saw, which came with a puny 2AH 40V battery. This 7.5AH battery is heavy, which actually helps to balance out the chain saw on the end of the pole assembly. I definitely have to use the shoulder strap to support the whole assembly, but with this battery, it's a tree-limb-cutting monster!
Date published: 2023-01-25
Rated 4 out of 5 by from Big Battery I purchased this battery as part of the package for a Whisper Series snow blower. I have used the snow blower once on a light snowfall and it performed well.
Date published: 2023-01-13
Rated 5 out of 5 by from Excellent capacity Work great for all of my the projects around the house! Long battery life and a fast charge keeps the work moving.
Date published: 2022-11-08
Rated 5 out of 5 by from Great Durability!! Bought this 7.5 AH battery and was able to cut an entire yard front and back with 3 light left. I was surprised how little battery was used.
Date published: 2022-10-02
Rated 5 out of 5 by from Great extended runtime for 40v mower! Bought the 7.5ah 40v battery to replace a 4ah for my ryobi mower. It’s an older generation mower, so at first it didn’t physically fit properly. However, some modifications to the battery bay with a dremel and we were off to the races! Love that I can now mow my 1/3 acre non stop with basically 1/2-3/4 of this single battery (depending on how tall/thick the grass is.
Date published: 2022-09-11
Rated 5 out of 5 by from Great Battery! Wow! I'd been having problems making it through the small front yard, till I got this battery! Not only does it do all of the front yard, it'll finish the small back yard at the same time!
Date published: 2022-08-27
Rated 5 out of 5 by from Great powerful Battery Picked this up to go into the Ryobi power inverter as a 4th battery. Powerful battery well built, little on the heavy side but so far so good. I have used on the Whisper blower and last for a very long time.
Date published: 2022-07-06
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