Summary

Solid, well-built cordless 165mm circular saw delivering dependable on-site performance, best used if you already own 20V XR batteries.

Findings

From the first pick-up, the DCS391B feels purpose-built for daily trades use. The base plate is sturdy and true, with clean, tool-free depth and bevel adjustments that pencil in cuts quickly and repeatably. The left-hand blade orientation gives excellent sightline to the cut, which is a real benefit when working overhead or against joists. The brushless motor runs smoothly and maintains a solid pace through softwood, with respectable run-time when paired with a solid 4-5Ah battery pack; it's more than capable for standard carpentry and joinery tasks on site. The 0-50° bevel range is useful for framing and finishing work, and the single-handed depth stop and bevel lever are straightforward to operate under load. In terms of build, the housing and motor assembly feel robust enough to withstand the knocks of daily trades use, and the tool balance remains comfortable for one-handed guiding while you push through a cut. The absence of any included battery or charger reflects its bare-tool status, so the value hinges on having compatible 20V XR batteries to hand. Overall, the quality of materials and the fit of components convey DeWalt reliability, and accuracy remains dependable for typical trade work, making it a strong option for electricians, joiners and framers who prioritise cordless convenience without sacrificing precision.

Pros

  • Lightweight, balanced design for one-handed operation on site
  • Brushless motor delivers efficient run-time and solid torque
  • Left-side blade improves visibility and cut line alignment
  • Tool-free depth and bevel adjustments with clear settings
  • Compatible with existing 20V XR battery ecosystem

Cons

  • Bare tool; battery and charger must be purchased separately
  • No blade included in the bare-tool package; source a 165mm blade
  • Cut throughput is lower than a corded equivalent for heavy-duty, long-reach work
  • No built-in dust extraction or vacuum port specified
  • Performance relies on battery type and condition, affecting run-time and efficiency

Price at time of review: £194.93