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Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S)

Ranked #3 of 18 in Best Cordless Lawn Mowers: Greenworks & Ryobi Push and Self-Propelled (2026). Here is every spec we scored, where it came from, and how it compares.

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#3

Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S)

Best for: 8 Ah 80V battery rated for 3/4 acre

6.5/10

What we like

Watch out for

Score breakdown

Deck width 25%

Kit battery energy 20%

Runtime 15%

Rated lawn size 15%

Cutting-height range 10%

Self-propelled 10%

Listed weight 5%

Deck width	21 in
Kit battery energy	640 Wh
Runtime	80 min
Rated lawn size	0.75 acres
Cutting-height range	2.62 in
Self-propelled	Yes
Listed weight	89.1 lb
Kit battery	80 V 8 Ah = 640 Wh (computed)
Cutting height	1.38–4 in
Cutting-height range	2.62 in (computed: max minus min)
Rated lawn size	Up to 3/4 acre (0.75 acres, computed)
Price	Check price

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Specs source:

Greenworks: 80V 21" 4-in-1 Self-Propelled Mower

Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S) head-to-head

Head-to-headGreenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S) vs Ryobi 40V HP Brushless 21" Self-Propelled Mower Kit (RY40HPLM01K2)Head-to-headRyobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower Kit vs Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S)Head-to-headGreenworks 60V 25" Dual-Blade Self-Propelled Mower (LM2516S) vs Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S)

How it compares

Open the full comparison table

Ryobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower Kit

#1 · The widest deck and biggest battery here

Greenworks 60V 25" Dual-Blade Self-Propelled Mower (LM2516S)

#2 · 25 in deck rated for 1 acre

Ryobi 40V HP Brushless 21" Self-Propelled Mower Kit (RY40HPLM01K2)

#4 · 80 min runtime on two 6 Ah batteries

Ryobi 40V HP Brushless 21" Self-Propelled AWD Multi-Blade Mower Kit (RY40HPLM03K2)

#5 · All-wheel drive with two 6 Ah batteries

Greenworks 80V 25" Dual-Blade Self-Propelled Mower (LM2508S)

#6 · 25 in deck on one 80V 4 Ah battery

Greenworks 60V 21" Self-Propelled Mower (LM2116S)

#7 · Two 60V 4 Ah batteries for 3/4 acre

Greenworks 40V 25" Dual-Blade Self-Propelled Mower (LM2504S)

#8 · 25 in deck on the 40V platform

Greenworks 48V (24V x 2) 21" Self-Propelled Mower (LM2112S)

#9 · Runs on two 24V USB batteries

Ryobi 40V HP Brushless 20" Self-Propelled Multi-Blade Mower Kit

#10 · Self-propelled 20 in with an 8 Ah battery

Greenworks 40V 21" Self-Propelled Mower (LM2154S)

#11 · Single 5 Ah battery, 1/3 acre

Ryobi 40V HP Brushless 21" Push Mower Kit

#12 · 21 in push mower with an 8 Ah battery

Ryobi 40V HP Brushless 20" Self-Propelled Mower Kit

#13 · Lightest self-propelled mower here at 42.8 lb

Ryobi 18V ONE+ HP Brushless 20" Self-Propelled Mower Kit

#14 · Self-propelled mower on 18V ONE+ batteries

Greenworks 60V 21" Push Mower (LM2116)

#15 · 21 in push mower on a 60V 5 Ah battery

Greenworks 40V 20" Push Mower (LM2034)

#16 · 20 in push mower for 1/3 acre

Ryobi 18V ONE+ HP Brushless 16" Push Mower Kit

#17 · Lightest mower here at 34.4 lb

Greenworks 40V 17" Push Mower (LM1724)

#18 · Compact 17 in mower for 1/4 acre