A 40V hedge trimmer wins for dense hedges, thick branches, and longer blade lengths — but for most homeowners with light-to-moderate trimming on a small property, a 20V hedge trimmer handles the job without the added weight.

The voltage difference comes down to motor power and blade length. A 40V platform pushes more current to the motor, which translates to fewer stalls on woody stems and faster blade speed through thick growth. A 20V hedge trimmer — like the Heinpro 22-inch model at 4.4 lbs — keeps weight low and runs on the same battery as your existing DeWalt or Milwaukee tools. If your hedges are under an inch thick, 20V is enough.

  • Heinpro 22-inch 20V hedge trimmer weighs 4.4 lbs tool-only — meaningfully lighter than most 40V trimmers.
  • 20V hedge trimmers typically handle branches up to 5/8-inch diameter; 40V models extend that to 3/4 inch or more.
  • 40V platforms require a separate battery system — they do not share packs with standard 20V MAX or M18 tools.
  • Heinpro 22-inch hedge trimmer uses dual-action blades, reducing vibration on both the forward and return stroke.

How to Choose

  • Pick the Heinpro 22-inch 20V hedge trimmer if: your hedges are under 5/8-inch thick and you already own DeWalt 20V MAX (DCB200–DCB240) or Milwaukee M18 batteries.
  • Pick a 40V hedge trimmer if: you're regularly cutting woody stems over 3/4-inch thick or managing dense, overgrown shrubs that stall lighter motors.
  • Pick the Heinpro 22-inch 20V model if: you'll be trimming overhead or at arm's length — 4.4 lbs tool-only is noticeably easier to hold extended than most 40V trimmers.
  • Pick a 40V hedge trimmer if: you're willing to buy into a second battery platform specifically for yard tools and need blade lengths above 24 inches.
  • Pick the Heinpro 22-inch 20V model if: your property is under 6,000 square feet with light-to-moderate hedges — the 22-inch dual-action blade covers a typical suburban hedge row without the extra weight or cost of a 40V system.