Model No. CM2040

40V MAX* Lithium 20 in. Mower

Packed with two 40V MAX* lithium batteries, this 20-inch cordless mower has the power and runtime you need to tackle tough mowing.  Features convenient 3-in-1 mulching, bagging, and side discharge.  EDGEMAX™ provides up-to-the edge cutting.

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AutoSense™ Technology

Your Mower Just Got Smarter

AutoSense™ Technology determines the thickness of grass and makes power adjustments accordingly. For thicker grass, the mowers kick into high power while in lighter grass, the mowers lower the power output to conserve battery life and extend runtime.


Features + Benefits

  • 2x 2.5 Ah - 40V MAX* Lithium Batteries for twice the runtime
  • 20" 3-in-1 mower- Mulching, bagging, or side discharging
  • Variable Speed Motor allows conserving the battery for greater efficiency & runtime
  • EdgeMax™ for close up to the edge cutting
  • 15 gallon nylon bag allows checking fill levels
  • 6-setting height adjust- Single level easily adjusts the height of cut between 1 1/2"-4" to cut all types of grass in the US
  • Ideal for mowing yard up to 1/3 acre
Black and Decker - 40V MAX Lithium 20 in Mower - CM2040

Product Specs

Charge Time at 60% 2 hrs
Cutting Heights 1 1/2- 4 in
Cutting Path 20 in
Height Adjustment Yes
Ideal Property Size 1/4
Mulching Capability Yes
Power Source Battery
Weight 47 lbs
  • (1) CN2040 40V MAX* Cordless Mower
  • (1) Grass Bag
  • (2) 40V MAX* Lithium Ion Batteries
  • (1) Charger