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You Already Own Ryobi 40V Tools. Your Lawn Mower Should Use the Same Battery.

1,512 verified buyers at 4.3 stars. If you own a Ryobi 40V trimmer, blower, or chainsaw, the Ryobi 40V HP Brushless 21-inch mower requires zero additional infrastructure — same battery, same charger, same platform. Add a brushless motor and a cross-cut dual blade that produces finer mulch clippings than single-blade competitors, and this is the no-brainer choice for Ryobi 40V tool owners.

If you don't own Ryobi 40V tools yet, the EGO 56V is the stronger fresh investment. But if you're already in the Ryobi ecosystem, the case for this mower closes quickly.

Best Mid-Range Cordless Mower4.3★ — 1,512 verified reviews

Ryobi 40V HP Brushless 21-Inch Cordless Lawn Mower

40V HP brushless motor21-inch deckCross-cut dual blade6 cutting heights3-in-1 mulch/bag/discharge
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Is This Page For You?

  • ✓Uses the Ryobi 40V battery platform — same battery as your Ryobi trimmers, blowers, and other tools
  • ✓Cross-cut dual blade produces finer mulch clippings than single straight-cut blades
  • ✓Brushless motor: more efficient, longer battery life, less heat buildup than brushed motors
  • ✓21-inch deck: wider coverage per pass than 20-inch competitors
  • ✗If you don't own Ryobi 40V tools, the EGO 56V is a better fresh investment
  • ✗Battery and charger sold separately on some configurations — verify package contents

Specs at a Glance

Voltage40V HP Brushless
Deck Width21-inch
MotorBrushless
Blade TypeCross-cut dual blade
Cutting Heights6 positions
Clipping Modes3-in-1 mulch/bag/discharge
Battery PlatformRyobi 40V

What 1,512 Verified Buyers Report

“Same battery as my trimmer and blower — no extra chargers”

The primary buyer motivation is the Ryobi ecosystem. Buyers report owning 3–6 Ryobi 40V tools and adding the mower as a logical extension. Zero additional infrastructure required.

“Cross-cut blade produces noticeably finer clippings”

Buyers upgrading from single-blade mowers notice the difference. Finer clippings break down faster as mulch and produce a cleaner visual result.

“Brushless motor handles slopes better than my old mower”

Multiple buyers specifically note slope performance improvements. Brushless motors maintain consistent torque across load conditions — the motor doesn't lose power on inclines the way brushed motors do.

40V brushless. 21-inch cross-cut. Same battery as your other Ryobi tools.
If you're in the Ryobi 40V ecosystem, this mower adds itself to your battery platform at zero additional infrastructure cost. Brushless motor, wider deck, finer clippings.
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Frequently Asked Questions

What Ryobi 40V battery and charger do I need?

Any Ryobi 40V G4 battery works. Higher Ah (amp-hour) batteries give longer run time — a 6.0Ah battery runs roughly twice as long as a 3.0Ah battery. If you already own Ryobi 40V batteries from other tools, those will work. Ryobi also sells the mower in tool-only configurations for existing battery owners.

What's the advantage of a brushless motor in a lawn mower?

Brushless motors have no carbon brushes to wear out, run cooler, use battery energy more efficiently (more run time per charge), and handle variable loads better. For a lawn mower, this means more consistent torque in thick grass and longer intervals between service.

Ryobi 40V vs EGO 56V for a 1/4-acre yard?

Both work on a 1/4-acre yard. If you own Ryobi 40V tools, the Ryobi mower is the clear choice — leverage existing batteries. If starting fresh with no 40V investment, the EGO 56V offers more power and a larger battery platform at a moderate price premium.

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