For most small yards, a 20V leaf blower is the practical winner — lighter and cheaper to run if you already own a 20V battery — but 40V blowers deliver meaningfully higher airflow and runtime for larger properties or wet, heavy debris.

The voltage difference reflects battery energy capacity, which translates directly into motor output and how long a blower runs between charges. A typical 20V blower in the 400–500 CFM range weighs around 3.5–4.5 lbs tool-only and handles driveways, patios, and suburban lots without issue. A 40V blower can push 550–700+ CFM with longer sustained runtime, but the battery is heavier and more expensive — often requiring a separate purchase if you're not already on a 40V platform.

  • Typical 20V leaf blower airflow: 400–500 CFM at 100–150 MPH.
  • Typical 40V leaf blower airflow: 550–700+ CFM, suited for larger lots and wet leaves.
  • 20V blowers generally weigh 3.5–4.5 lbs tool-only; 40V models run heavier due to larger battery packs.
  • 20V batteries (e.g., DeWalt DCB200–DCB240) are cross-compatible with drills, saws, and other 20V tools; 40V batteries are a separate, dedicated system.
  • Runtime on a 20V 4Ah battery for a 500 CFM blower: approximately 15–25 minutes under typical load.