DEWALT DC390Bvs DCS391P1 Circular Saw | Ultimate Battle

Sometimes a construction site might not have electricity supplied to it yet. In such a scenario, you will need a cordless circular saw to handle some of the projects.

Well, for most contractors, the DeWalt brand might just have something they want. For this case, we will look at two popular cordless circular saws from DeWalt.

These models include the DeWalt DC390B and the DeWalt DCS391P1 units.

Quick Summary

The DeWalt DC390B is a compact and lightweight circular saw that most contractors would want. Based on its power capability, we find it ideal for lightweight applications and DIY projects.

As for the DeWalt DCS391P1 unit, it is built to be stronger and more powerful. It is great for handling the heavy-duty applications that the DC390B model might struggle to work on.

The Comparison

DeWalt DC390B Cordless Circular Saw

DEWALT DC390B 6-1/2-Inch 18-Volt Cordless Circular Saw (Tool Only)

Among the many benefits of using a DeWalt circular saw, the DC390B unit stands out for being lightweight, portable, and powerful for its size. Here are more features of the unit.


For a model that is portable, its weight is important. This model weighs 7.8 pounds. Considering that it also has an ergonomic handle, the saw will make it easier for you to have a comfortable operation. Being lightweight is also good for minimizing the user fatigue. The balance that you feel in the hand with the tool helps to provide you with precise cuts.


We also have to look at the size of the unit before saying that it is compact. This unit measures 8.9 x 15.9 x 10.5 inches. The considerable short length makes it easy to maneuver the unit even when working in limited spaces. The user can operate the unit at angles that might be hard to achieve when working with longer models. Besides offering such valuable benefits, being compact means that it will be easier to take it to different job sites.

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DEWALT DC390B 6-1/2-Inch 18-Volt Cordless Circular Saw (Tool Only)


Coming from a brand such as DeWalt, we can expect it to be good in terms of construction. It is highly durable to give you years of use without worrying about replacing it. The high-strength magnesium shoe will live up to any workshop applications for a circular saw. The motor is also fan cooled to ensure it remains cool even when working on various projects the whole day.

Cutting Capacity

The unit can be fitted with a 6.5-inch blade. This blade has carbide tips to improve its overall durability and functionality. The result of using such a blade is that you end up with an exceptional cutting capacity for its size. You will get 2.25 inches cutting depth when cutting at 90 degrees and 1-5/8 inches when at 45 degrees.

The bevel capacity is up to 50 degrees. This should make it great for those who need to make angled cuts on various workpieces.

What We Like

  • It is a lightweight and portable unit
  • The saw is quieter as compared to similar models
  • Its speed helps with achieving clean cuts

What We Didn’t Like

  • It lacks a battery and charger

The Solution: The DCS390B is sold as a bare tool. If you want a battery and charger, consider ordering it from DeWalt to get high quality parts.

DeWalt DCS391P1 Circular Saw

DEWALT 20V MAX 6-1/2-Inch Circular Saw Kit, 5.0-Ah (DCS391P1)

The DCS391P1 is another top option for those looking for a portable circular saw from DeWalt. The unit is not the cheapest, but it has some of the best features you want from a circular saw. Below are more of its features.

The Power and Battery

The DCS391P1 unit stands out for its power. The model can spin the blade up to 5,250RPM. These speeds are not commonly associated with a battery powered circular saw. Such are mostly left for the corded units.

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With the strong motor and more power, it is easy to see that it will be an ideal too for anyone who needs to handle heavy duty applications. It is why most people who get this unit will be working on demanding cuts.

The unit is powered by a 20V 5.0AH battery. This type of battery is ideal for giving the unit more run time. It is going to work great for anyone who needs to work on several projects in a day.

DEWALT 20V MAX 6-1/2-Inch Circular Saw Kit, 5.0-Ah (DCS391P1)

Build Quality

The overall build quality of this unit stands out as being one of the best. The unit features a high strength and magnesium shoe. This makes it durable to handle the harsh job site conditions. You would comfortably use the unit knowing that it will stand up to the different abuses it might face at a construction site.


When it comes to ergonomics, we also find it being compact enough for ease of portability. It has dimensions 13 x 17 x 9.3 inches. This will help you carry to different sites without feeling it is a burden. Also, the overmolded grip offers more comfortable grip and control over the tool. This allows for the best accuracy each time you make cuts with the tool.

Cutting Capacity

This unit is still good in terms of cutting capacity. With its 6.5-inch blade, it is going to be an ideal tool for you to consider for various lumber jobs. It does offer 2.25 inches for the cutting depth at 90 degrees. If you want to make angular cuts, that is also possible as it can bevel up to 50 degrees.

  • It has an impressive cutting capacity
  • The high strength magnesium construction makes it durable
  • It is powerful, making it good for heavy duty applications

What We Didn’t Like

  • Only supplied with one battery

The Solution: For a cordless circular saw, it might be best to get it with two batteries. You can always get an additional battery from DeWalt as a backup power source.

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Which is Better?

Both models have some of the best build quality for the money. They are also designed to have the best in terms of cutting capacity. As such, they will be great for cutting the large workpieces at any job site. Still, they can both bevel up to 50 degrees. This makes them great for handling angular cuts with ease.

If we have to decide which one is better, then the DeWalt DCS391P1 unit stands out as the best option. It is designed to work great in terms of handling the heavy-duty applications better than the DC390B unit. Also, it comes with all the accessories that you need to start using it right out of the package unlike the DC390B, which is a bare tool.


The best part about buying a DeWalt circular saw is that you always know it can live up to your expectations. That is what you get with the two models reviewed above. The DC390B unit will be ideal for anyone working on simple projects or a DIYer.

For someone who needs to cut thicker and tougher materials, then opt for the DCS391P1 unit. Both models are good for their various applications. Just make sure you get the right tool for the job.