DEWALT 20V MAX Circular Saw, 6-1/2-Inch Blade, 460 MWO Engine, 0-50 Degree Bevel Capability, Battery Not Included - Tool Only (DCS391B)

TLDR Review: DEWALT DCS391B Circular Saw

Published: May 25th, 2025
Last Updated: July 18th, 2025

Pros

  • Adequate power for cutting through subfloors and large pieces of wood.
  • Performs excellently for cutting 3/4 plywood for extended periods.
  • Highly durable, has withstood drops and rough handling, ideal for maintenance work.
  • Lightweight and easy to maneuver, especially with a 5.0 Ah battery.
  • Comfortable handle design enhances ease of use.
  • Onboard wrench for easy and quick blade changes.
  • Smooth adjustment features add convenience.
  • Reliable performance even after years of use and under extreme conditions.

Cons

  • Lacks a saw dust chute, causing debris to blow everywhere.
  • No integrated light, making it challenging to see the cutting line.
  • Plastic guard feels flimsy and may not survive drops.
  • Blade placement can direct dust toward the user.
  • Motor performance lags compared to highend models, requiring slower cutting speeds.
  • Users reported frequent operational issues, stopping after short distances.
  • Requires a specific 5 Ah battery; a 4 Ah battery is optimal, while a 2 Ah battery struggles.
  • Minor issues with plastic safety guard, although repairable.

Bottom Line

The DEWALT 20V MAX Circular Saw (DCS391B) is a powerful and lightweight tool suitable for various cutting tasks, from subfloors to plywood. Despite some issues with dust management and operational dependability requiring careful battery matching, it remains a durable choice for professionals and DIY enthusiasts. If precise adjustments and robustness are priorities, consider investing in this tool, but do expect to purchase additional batteries and a more suitable blade for optimal performance.

Lowest at any Popular Retailer
$88.99 at woot!
How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 11 retailers to give you the short version.

Where to Buy

Prices last updated: April 12th 2026 3:43 am
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