20V MAX Circular Saw, Cordless Sidewinder Style Portable

Reliable 20V Sidewinder for Efficient Framing and Sheet Good Cuts

Full manufacturer title

DEWALT 20V MAX Circular Saw, Cordless Sidewinder Style Portable, 6-1/2-Inch Blade, 5150 RPM, 0-50 Degree Bevel Capability, Battery Not Included (DCS391B) Yellow 6-1/2 inches

Typical price

$159

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DEWALT 20V MAX Circular Saw, Cordless Sidewinder Style Portable, 6-1/2-Inch Blade, 5150 RPM, 0-50 Degree Bevel Capability, Battery Not Included (DCS391B) Yellow 6-1/2 inches image 1

Ravvy verdict

89.6 / 100

A dependable choice for general carpentry that trades absolute depth of cut for superior maneuverability and jobsite durability.

Best for: DIY enthusiasts and professional contractors already on the DeWalt battery platform
Buy it if: You want lightweight magnesium shoe adds durability.
Skip it if: You are heavy-duty timber framers or those requiring dust extraction ports.
Best alternative: DEWALT 20V MAX XR Jig Saw, 3,200 Blade Speed, Cordless, Brushless Motor, LED Light, Bare Tool Only (DCS334B) (Professional contractors and serious woodworkers already on the DeWalt battery platform)

How it scores on what matters

Portability94.2
Ergonomics91.0
Build Quality88.0
Versatility85.5
Cutting Power82.5

Ravvy factor scores, 0 to 100, derived from specs, owner reviews and category norms.

What it is

The DEWALT DCS391B stands out as a staple in the 20V MAX lineup, prioritizing balance and weight reduction without sacrificing the power needed for daily construction tasks. Its magnesium shoe provides a rigid, flat surface that resists warping over time, which is a common failure point in cheaper steel-stamped models. The 5,150 RPM motor is specifically tuned to maximize the efficiency of the 6.5 inch blade, allowing users to slice through 2x4 lumber at a 45 degree angle in a single pass. While it lacks the sheer torque of high-end worm drive saws, this sidewinder excels in ergonomics. The rubber overmolded grip reduces vibration during long rip cuts, and the tool weight is distributed to minimize wrist fatigue. It is a highly mobile solution for installers who need to make quick, accurate cuts on a roof or in a tight crawlspace where a corded saw would be a liability.

Ravvy AI insight

As a bare tool, this offers exceptional value if you already own 5.0Ah batteries or larger. Users should note that while it is marketed at 5,150 RPM, performance significantly drops when using compact 2.0Ah batteries, so prioritize high-capacity packs for hardwood or thick pressure-treated lumber.

Generated from owner feedback, product specs, pricing, and retailer data. Last updated Aug 18, 2026.

What owners praise

Lightweight magnesium shoe adds durability
Excellent balance reduces user fatigue
Generous 50 degree bevel capacity
Standard 6.5 inch blade is easy to find
Fast spindle lock for quick blade swaps
High RPM prevents splintering in plywood

What to know first

Does not include a battery or charger
No built-in LED work light
Lacks a dedicated dust collection port

Specifications

UPC: 885911262354
GTIN: 885911262354
Brand: DEWALT
Color: Yellow
Speed: 5100 rpm
Voltage: 20 volts
Brand Name: DEWALT
Unit Count: 1 Count
Blade Shape: Round
Item Weight: 3.16 kg
Blade Length: 6.5 inches
Manufacturer: DEWALT
Model Number: DCS391B
Power Source: Battery Powered
Cutting Angle: 50 degrees
Warranty Type: Limited Warranty
Blade Material: High Speed Steel
Item Type Name: 20V MAX Li-Ion Circular Saw
Number of Items: 1
Number of Teeth: 18
Specification Met: (unset)
Included Components: 20v 6-1/2" circular saw
Number of Batteries: 1 Lithium Ion batteries required.
Surface Recommendation: Wood
Manufacturer Part Number: DCS391B
Item Dimensions L x W x H: 15.5"L x 8.5"W x 10.5"H
Manufacturer Warranty Description: 3 Year Limited Warranty
Global Trade Identification Number: 00885911262354
Other Special Features of the Product: Keyless Blade Change

How to get the most out of it

Achieving Cleaner Cuts

The included 18-tooth blade is designed for fast framing. For cabinetry or finish work, swap it for a 40-tooth or 60-tooth carbide blade to minimize tear-out on the face of the wood.

Ownership tips

tip

Battery Selection

For optimal performance and longer runtimes, pair this saw with a DeWalt XR 5.0Ah battery or a FlexVolt pack. Small 2.0Ah batteries often lack the current draw needed for heavy rip cuts and will stall more frequently.

care

Shoe Maintenance

Periodically check the magnesium shoe for debris or burrs that could scratch your workpiece. Wipe the base with a dry cloth and ensure the bevel adjustment levers are free of sawdust to maintain accuracy.

Frequently asked questions

Can this saw cut through a 4x4 post?

No, it cannot cut through a 4x4 in a single pass. With a maximum cut depth of 2-1/8 inches, you would need to make one cut, flip the post, and make a second cut to finish the job.

Does it come with a rip fence or guide?

This specific model (DCS391B) does not typically include a rip fence in the box. However, it is compatible with standard DeWalt rip guides which can be purchased separately for more accurate long cuts.

Is the blade on the left or right side?

This is a right-blade saw, which is the standard configuration for sidewinder circular saws. This design provides better visibility for right-handed users when checking the motor-side of the cut.

Will it work with older DeWalt 18V batteries?

No, this tool is designed exclusively for the 20V MAX lithium-ion battery system. It will not fit the older 18V NiCad or lithium batteries unless you use a specific DeWalt DCA1820 battery adapter.

Where can you buy the 20V MAX Circular Saw, Cordless Sidewinder Style Portable?

20V MAX Circular Saw, Cordless Sidewinder Style Portable is sold through Amazon, and DEWALT also lists it through its own site and major retail partners. The buy link on this page goes straight to the current Amazon listing, which is where stock and pricing update most often.

How much does the 20V MAX Circular Saw, Cordless Sidewinder Style Portable cost?

The last price Ravvy recorded was $159. Retail pricing on power tools moves with promotions and stock, so treat that figure as a reference point and check the live listing before you buy.

How do you get the 20V MAX Circular Saw, Cordless Sidewinder Style Portable for a cheaper price?

Three tactics work best: watch for holiday and seasonal sale events when power tools discounts run deepest, compare the open box or renewed listing against new stock, and check whether DEWALT is running a coupon or bundle. Adding the product to your Ravvy wishlist keeps it handy so you can revisit the listing when prices drop.

Is the 20V MAX Circular Saw, Cordless Sidewinder Style Portable in stock right now?

It was in stock at our last check. Availability on popular power tools can change within hours, so the live listing is the source of truth.

Is the 20V MAX Circular Saw, Cordless Sidewinder Style Portable worth it?

Ravvy scores it 89.6 out of 100. The strongest argument for it is lightweight magnesium shoe adds durability. The trade off to weigh is does not include a battery or charger.

Who should buy the 20V MAX Circular Saw, Cordless Sidewinder Style Portable?

It fits dIY enthusiasts and professional contractors already on the DeWalt battery platform If that does not describe your situation, compare it with the other options in Power Tools before committing.

What are the key specs of the 20V MAX Circular Saw, Cordless Sidewinder Style Portable?

UPC: 885911262354. ASIN: B007NVSTO8. GTIN: 885911262354. Brand: DEWALT.

What are good alternatives to the 20V MAX Circular Saw, Cordless Sidewinder Style Portable?

Compare it against the other scored picks in Power Tools on Ravvy. We rank every option in that group by the same criteria, so you can see which model wins on value, quality, and owner sentiment before you decide.

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