Best Cordless Lawn Mower – Head to Head Comparison
Cordless Lawn Mower Head to Head Video Preview
Noise – Winner Kobalt KM1940-06
One of the biggest questions readers have asked about cordless mowers seems to be how loud are they?
We did a basic decibel test to measure the noise of the mowers in a controlled situation to get a relative comparison of noise. The test consisted of running each mower with the deck raised to it’s highest level sitting on a concrete slab. We measured the decibel levels with a simple cell phone app. Many of the mower
motors start at a high RPM and cycle down to a slower speed to save energy (the motors cycle up in RPMs with taller or thick grass). We measured the noise at both high and low levels where applicable.
|Brand||Model #||Noise Level|
|Black & Decker||CM1936||77 dB|
|Craftsman||25081||73 to 80 dB|
|Kobalt||KM1940-06||71 to 78 dB|
|Kobalt||KM2040X-06||74 to 78 dB|
The average gas powered lawn mower is approximately 90 dB. Therefore, these cordless mowers are almost 100 times less noisy compared to the gas mower. (decibels are a logarithmic scale, 20 decibels difference is 100 times louder). While the Kobalt did edge out the other models, all of them are significantly quieter compared to a traditional gas powered mower which is a good thing!
Run Time Winner – Black & Decker CM1936
Run time is another big question on the minds of people considering the move from gas powered to battery powered mowers. Huge advancements in battery technology are making these cordless mowers a viable option but the million dollar question on everyone’s mind is how long can you mow on a charge? Mowing run time will vary greatly depending on height of grass, thickness of grass, and type of grass.
In order to get a relative comparison of run time we tested the mowers under “no load” conditions. Obviously this results in longer run times than can be expected while mowing grass, it does allow us to compare the mowers on the same conditions to rank them from longest run time to shortest run time.
|Brand||Model #||No. Batteries||Battery Size||Run Time|
|Black & Decker||CM1936||1||12 Ah||1 hr 43 min|
|Craftsman||25081||2||4.0 Ah & 2.0 Ah||1 hr 16 min|
|EGO||LM2001||1||4.0 Ah||58 min|
|Kobalt||KM1940-06||1||4.0 Ah||59 min|
|Kobalt||KM2040X-06||2||4.0 Ah & 2.0 Ah||1 hr 17 min|
While the Black & Decker definitely took the run time category it does come at a price and that’s overall weight. The large, bulky battery weighs 30 lbs and it’s the size of a small car battery. The battery is a sealed lead acid battery much like an automobile battery which is much different than the other battery types.
All of the other mowers averaged about 1 hour of run time. The Craftsman and 20″ Kobalt both use two batteries so we tested them with the 4.0 and 2.0 Ah batteries that came standard with the mowers. The run time would definitely go up if you used two 4.0 Ah batteries in them so that’s certainly something to consider as an upgrade.
Also, another thing to consider in this category is the charge time for the batteries. While the B&D lasts longer, it takes MUCH longer to charge. The user manual states 12 to 20 hours to charge the battery compared to just an hour or two with all the other models. EGO really does great with their 30 minute fast charger which really comes in handy.
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