Model: #P1121

4.7 | 77 Reviews
The Ryobi Lithium+ Mowers redefine the 18-Volt category by delivering the power, run time and performance you’d expect from higher voltage lines, while still offering the versatility of the ONE+ system. The Ryobi 16 in. Hybrid 18-Volt Lithium+ Lawn Mower is the first dual power mower in the industry. Its unique design allows you to switch from the included ONE+ 4.0 Ah lithium-ion battery to an extension cord to ensure that you will never run out of power. This mower has two battery ports, giving you the option of using a second ONE+ battery to increase the cordless run time. With its simple push button start and single point height adjustment, this mower makes lawn care easier than ever before. Its lightweight and compact design makes this mower ideal for small yards and maneuvering in tight spaces. This mower also has a 2-in-1 mulching or bagging system, allowing you to get the job done quickly and just the way you like. The foldable handle has quick-release knobs, making it simple for those with limited storage to prepare for use and put up. For additional convenience, this lightweight, compact mower has a top-mounted handle, making it easy to carry from one place to another. The 18-Volt Lithium+ battery and charger are compatible with any of the Ryobi 18-Volt ONE+ tools. Backed by a 3-year warranty.


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

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  • *This mower is not compatible with 18V ONE+™ LITHIUM+™HP 9.0 AH Battery (Model P194)
  • *This mower is not compatible with 18V ONE+™ LITHIUM+™HP 6.0 AH Battery (Model P193)
  • Power Source: 18V Battery or Extension Cord
  • Deck Size: 16 in
  • Mulching Capability: Yes
  • Blade Length: 16 in
  • Weight: 40 lb


  • Dual Power Mower
  • Grass Bag
  • Start Key
  • Mulching Plug
  • 18V 4AH Battery
  • 18V Charger
  • Operator's Manual


18V ONE+™ LITHIUM+™ HYBRID 16" MOWER WITH (2) 4AH BATTERIES & CHARGER is rated 4.7 out of 5 by 77.
Rated 4 out of 5 by from Versatile mower Just bought this to replace manual reel mower that had trouble cutting through my weed infested lawn and too long grass. I also already had some Ryobi 18V tools. I chose this model because it is able to be plugged in as well as use batteries. Unfortunately, this model does not come with a battery or a charger. I also bought a 2-pack of 4Ah batteries at the same time. Using it for the first time with my previous 18v batteries (24Wh), I was not able to run it for more than 5 minutes. I was only able to use it plugged in while my new batteries where charging. It cut through everything in one-pass. The performance was really great. It is also not too loud; not that I would want to run this too early or too late, but it is far from obnoxious.
Date published: 2018-06-02
Rated 4 out of 5 by from Light weight easy to use on hills. I have had this mower for a little over a month. Used twice so far to cut a small yard less than .25 acres. Takes me 4 4ah and about half of a set of 3ah to get threw the whole thing. Going up or down hills is easy due to the weight. The bag fills up a bit faster than I would like but it is easy to remove and dump. From a noise perspective it is nice and quiet. My dog does not even want to run away from me while I am mowing. Overall if you have a smaller yard this is the mower for you. And if you run out of batteries you can just run it as a corded mower. Cleaning is a breeze, dirt and grass slide right off.
Date published: 2020-08-07
Rated 4 out of 5 by from Mostly great Pros: lightweight, compact, works great for smaller properties, the one lever height adjustment is awesome! Cons: 6ah batteries do not work in this product unless you only use one battery. Mower shuts itself off in taller grass so I have to mow on the second to highest setting.
Date published: 2018-06-04
Rated 5 out of 5 by from Perfect for a small yard. Storing a bunch of heavy, stinky, finicky, gas lawn care equipment, as well as gas cans, for a small yard is more than just an inconvenience, it can be exasperating. The Ryobi 18v system is the perfect solution. The mower is light, powerful, maneuverable, full featured, and offers easy indoor storage. It's perfect for maintaining small yard. Coupled with an 18v trimmer, and 18v blower, it is a complete yard care package that conveniently stores in a small space with no mess and no hassle. I couldn't be more pleased with this mower and the 18v system in general.
Date published: 2020-07-23
Rated 4 out of 5 by from Great Mower I was very impressed with the power of this mower and I didn't expect much but I was really blown away. It was easy to set up and the only difficult part was getting the mulch pug in the back part of the mower as it was a really tight fit. The mower cut my 1500 sq ft. home with no issues and on one battery charge with a couple of passes to get the really tall stuff. I have a lot of fescue, crab mix with cover patches, weeds, and it cut it all in one or two passes. Really glad I bought this and I would recommend this product.
Date published: 2019-04-14
Rated 5 out of 5 by from A Relaxing Mow I bought this product to replace my last Ryobi MOwer which had a lead acid battery. I found this mower to be lighter and easy to mow with. Also with the lithium batteries the mower did not get as hot. ANd they ran of juice and they had to recharge it gave you time to catch your and sit and have a beer. A relaxing mow.
Date published: 2018-03-13
Rated 5 out of 5 by from Light and easy to push I bought this as a replacement for a 20-year-old gas powered Honda that was self-propelled and very heavy for me. That has needed a lot of work. I am hoping that this mower Will make mowing a lot easier for me. I have other Ryobi products that you use the 18 V batteries so it’s going to be very easy to enter change them. I have been able to push it up and down the hill with very little effort. The mulching device works great! I will never use the bag but it’s nice to have in case I need it for leaves or something.
Date published: 2021-05-08
Rated 5 out of 5 by from Exceeded Expectations! I was tired of my old reel mower and wasn't interested in gas powered. Investigating other mowers I decided on this hybrid mower. It has more power than i expected, even on longer grass. Haven't invested in more batteries (yet!) but it's nice to be able to switch to corded power for the parts of my yard that are left. It hasn't really been a problem which is fantastic. I'm definitely going to buy more batteries and Ryobi devices because of how satisfied I am by this mower.
Date published: 2018-03-31
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