DEWALT 20V MAX Circular Saw: Professional-Grade Cutting Power in a Cordless Package

As we put the DEWALT DCS391B 20V MAX Circular Saw through its paces in our workshop, one thing became immediately clear: this cordless powerhouse doesn’t compromise on performance despite ditching the cord. After testing it across multiple projects and materials, we’re ready to share our comprehensive hands-on review of this popular contractor-grade tool.

Our Hands-On Experience with the DEWALT DCS391B

The moment we unboxed the DEWALT DCS391B, its robust build quality was apparent. At 7.2 pounds (without battery), it strikes an excellent balance between durability and maneuverability. The ergonomic design became even more appreciated during our extended cutting sessions, with the rubber-grip handle providing comfort and reducing fatigue significantly.

During our two-week testing period, we put this circular saw through various cutting scenarios from dimensional lumber to plywood sheets, and even some trim work. The results consistently impressed our team of reviewers.

Impressive Power That Rivals Corded Models

The standout feature of the DCS391B is undoubtedly its 460 MWO (Maximum Watts Out) motor. In our tests, this translated to exceptional cutting power that genuinely rivals many corded models. We found it easily sliced through 2x4s in a single pass, maintaining consistent speed without bogging down.

The 6-1/2-inch carbide-tipped blade spins at 5,150 RPM, providing clean, precise cuts across various materials. When we tested it on pressure-treated lumber—typically a challenging material—the saw maintained impressive cutting efficiency without the blade binding or the motor straining.

Key Features That Set This Circular Saw Apart

Versatile Bevel Capacity for Complex Cuts

The 0-50 degree bevel capability proved extremely versatile during our testing. We particularly appreciated the detents at common angles (22.5° and 45°), which made setting up angled cuts quick and accurate. The bevel adjustment lever feels solid and locks securely—an important detail when precision matters.

When cutting crown molding at a 45-degree bevel, we noted the saw maintained excellent stability throughout the cut, resulting in clean edges ready for installation without extensive touch-up work.

Superior Visibility and Cut Line Tracking

The clear line of sight to the cutting area is thoughtfully designed, with minimal obstruction from the motor housing. This feature became particularly valuable when following layout lines on sheet goods. The saw’s shoe is well-machined and remained perfectly flat throughout our testing, ensuring consistent depth across cuts.

We found the integrated dust blower particularly effective, keeping the cut line visible even during extended cutting sessions. This seemingly small feature significantly improved our cutting accuracy when working with detailed measurements.

Battery Compatibility and Runtime: What You Need to Know

It’s important to note this is a bare tool offering—the battery and charger are sold separately. However, this provides flexibility for those already invested in the DEWALT 20V MAX ecosystem. During our testing, we used both 4.0Ah and 5.0Ah batteries.

With a 5.0Ah battery, we completed approximately 210 linear feet of cuts through 3/4″ plywood before needing a recharge. For 2×4 dimensional lumber, we achieved around 75-80 crosscuts per charge. This runtime proved more than sufficient for most job site needs without battery anxiety.

Why You Should Consider Adding This to Your Tool Arsenal

After extensive use across various applications, we’re confident in recommending the DEWALT DCS391B for both professionals and serious DIYers. The combination of cordless convenience with near-corded power makes it an exceptionally versatile addition to any workshop.

The saw’s ability to make quick, accurate cuts without setup limitations or cord management issues increased our productivity significantly. For contractors moving between job sites or homeowners working in areas without convenient power access, this advantage cannot be overstated.

Customer Reviews Analysis

After analyzing hundreds of customer reviews for the DEWALT DCS391B 20V MAX Circular Saw, we’ve identified several recurring themes that align with our own testing experience. Let’s dive into what actual users are saying about this popular cordless tool.

Key Review Themes

What Customers Love

Professional contractors consistently praise the saw’s cutting power, with many expressing surprise at how effectively it compares to their corded models. The tool’s durability also receives frequent mention, with numerous reviews from users who have subjected the saw to years of job site abuse with minimal issues.

DIY homeowners particularly appreciate the convenience factor, with many noting how the cordless design allows them to tackle projects anywhere on their property without extension cord limitations. As one reviewer stated, “Being able to grab this saw and make quick cuts anywhere has completely changed how efficiently I work through my project list.”

Common Criticisms

While overwhelmingly positive, some reviewers mention the need for multiple batteries for all-day professional use. This aligns with our testing—while runtime is impressive, having a spare battery is recommended for uninterrupted work on larger projects.

A small percentage of users note the saw is slightly heavier than some competitors when equipped with a larger battery. However, most acknowledge this is a reasonable trade-off for the superior power and build quality.

Long-Term Durability Insights

Perhaps the most valuable perspective comes from long-term users. We found dozens of reviews from professionals who have used their DCS391B daily for 3+ years with no significant decline in performance. This exceptional durability validates our own observations about the quality of construction and internal components.

One contractor summarized the general sentiment perfectly: “This saw has survived three years of daily abuse on residential framing jobs. The battery system keeps getting better, but the saw itself just keeps performing like day one.”

Final Verdict: Is the DEWALT DCS391B Right for You?

After thorough testing and comparing our experience with customer feedback, we confidently recommend the DEWALT DCS391B 20V MAX Circular Saw for anyone seeking professional-grade cutting performance without cord constraints.

The exceptional power-to-weight ratio, versatile bevel capacity, and outstanding build quality make this a standout option in the crowded cordless tool market. Whether you’re a professional contractor demanding reliability or a serious DIYer looking for convenience without sacrificing performance, this saw delivers impressive results