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Greenworks 40V 21" Brushless Cordless (Smart Pace / Self-Propelled) Lawn Mower (75+ Compatible Tools), (2) 4.0Ah Batteries and Charger Included 21" Mower (2 x 4.0Ah)

4.1
Based on 13,436 reviews
Real-World Testing
30 days of real-world testing
Amazon
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About the Author

Expert analysis by Jasper Linthorne

Jasper Linthorne

Jasper Linthorne

Expert Reviewer

Section Contributor

Jasper contributes occasional pieces on portable recorders and practice mics for Review Atlas. He favors gear that’s easy to set up, forgiving to learn, and tough enough for rehearsals and backyards alike.

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How We Tested This Product

Our rigorous, independent testing process

Testing Period
30 days
Tested By
Jasper Linthorne

Our Testing Process

  • We purchase all products at full retail price to ensure unbiased testing
  • Products are tested in real-world conditions matching everyday use
  • Our experts conduct both objective measurements and subjective evaluations
  • Reviews are regularly updated as new products enter the market
  • Tested according to our Walk-Behind Lawn Mowers testing methodology
Learn more about our testing methodology
Last updated: November 25, 2025
Independently tested and reviewed