Best 21-Inch Battery Mowers
Every candidate has verified battery power and a 21-inch catalog deck. Medium-lawn Yard Fit then separates models by drive type, claimed runtime, and evidence confidence.
See our ranked picksEligible models
30
Published picks
4
Ranking basis
Known facts
At a glance
The shortlist
Jump directly to a selected mower, or scan the complete shortlist before comparing details.
- Top category fit#1
POWER+ 21" Peak Power Self-Propelled Mower Kit
EGO · LM2142SP
Yard Fit context
strong fit · high confidence
- Runner-up#2
80V 21" 4-in-1 Self-Propelled Mower
Greenworks · MO80L810
Yard Fit context
strong fit · high confidence
- Strong alternative#3
40V HP Brushless 21" Self-Propelled Mower Kit
RYOBI · RY40HPLM01K2
Yard Fit context
strong fit · high confidence
- Also considered#4
40V HP Brushless 21" Push Multi-Blade Mower Kit
RYOBI · RY40HPLM04K2
Yard Fit context
strong fit · high confidence
MowerMatch rankings
Our top picks, ranked
Every eligible mower is evaluated against the category rules below. Editorial scores do not determine the order.
- #1Top category fitstrong fit · high confidenceLM2142SP
Product illustration for EGO model LM2142SP EGO · LM2142SP
POWER+ 21" Peak Power Self-Propelled Mower Kit
The EGO LM2142SP is a 21-inch self-propelled battery mower on the 56-volt platform. Its manufacturer claim is up to 80 minutes of runtime. The verified kit includes 2 batteries and a charger.
- Deck
- 21 in
- Power
- 56V
- Drive
- Self-propelled
- Claimed runtime
- 80 min
Why it ranks here
Strong medium-lawn fit with high evidence confidence. 21-inch deck is in the coverage range favored for medium lawns.
- #2Runner-upstrong fit · high confidenceMO80L810
Product illustration for Greenworks model MO80L810 Greenworks · MO80L810
80V 21" 4-in-1 Self-Propelled Mower
The Greenworks MO80L810 is a 21-inch self-propelled battery mower on the 80-volt platform. Its manufacturer claim is up to 80 minutes of runtime. The verified kit includes 1 battery and a charger.
- Deck
- 21 in
- Power
- 80V
- Drive
- Self-propelled
- Claimed runtime
- 80 min
Why it ranks here
Strong medium-lawn fit with high evidence confidence. 21-inch deck is in the coverage range favored for medium lawns.
- #3Strong alternativestrong fit · high confidenceRY40HPLM01K2
Product illustration for RYOBI model RY40HPLM01K2 RYOBI · RY40HPLM01K2
40V HP Brushless 21" Self-Propelled Mower Kit
The RYOBI RY40HPLM01K2 is a 21-inch self-propelled battery mower on the 40-volt platform. Its manufacturer claim is up to 80 minutes of runtime. The verified kit includes 2 batteries and a charger.
- Deck
- 21 in
- Power
- 40V
- Drive
- Self-propelled
- Claimed runtime
- 80 min
Why it ranks here
Strong medium-lawn fit with high evidence confidence. 21-inch deck is in the coverage range favored for medium lawns.
- #4Also consideredstrong fit · high confidenceRY40HPLM04K2
Product illustration for RYOBI model RY40HPLM04K2 RYOBI · RY40HPLM04K2
40V HP Brushless 21" Push Multi-Blade Mower Kit
The RYOBI RY40HPLM04K2 is a 21-inch push battery mower on the 40-volt platform. Its manufacturer claim is up to 80 minutes of runtime. The verified kit includes 2 batteries and a charger.
- Deck
- 21 in
- Power
- 40V
- Drive
- Push
- Claimed runtime
- 80 min
Why it ranks here
Strong medium-lawn fit with high evidence confidence. 21-inch deck is in the coverage range favored for medium lawns.
How we picked
The 21-inch deck requirement is exact. Within that eligible set, medium-lawn Yard Fit and evidence confidence create the order.
- 01
Verified deck width
Only catalog records with a 21-inch deck enter this category.
- 02
Drive difference
Push and self-propelled models remain distinct; drive type contributes to the category fit rather than being hidden.
- 03
Runtime evidence
Known manufacturer runtime claims help separate battery models, while unknown claims lower confidence.
Before you buy
Buying advice
A shared deck size does not make sibling models identical. Check drive type, platform, kit contents, weight, and exact model suffix.
- 01
Verify exact identity
Closely related kit and bare-tool variants can share the same deck and platform while including different equipment.
- 02
Compare known—not assumed—differences
Use verified drive, runtime, weight, battery, charger, and warranty fields rather than model-name similarity.
Common questions
Frequently asked questions
Is 21 inches the cutting swath or catalog deck width?
This category uses the normalized catalog deck-width field and does not relabel it as a separately verified cutting swath.
Are sibling models treated as the same mower?
No. Exact model, platform relationship, kit contents, and aliases remain separate identity evidence.