Dewalt FLEXVOLT vs MILWAUKEE M18 FUEL Technology


When it comes to cordless power tools, DeWalt and MILWAUKEE are fierce rivals that compete head-to-head to deliver the best power tools for their customers. With the passage of time, both brands have incorporated new innovations into their power tools lineup. Among all the power tools, circular saws are the most popular amongst woodcutters, carpenters, and DIY enthusiasts. T

hey are portable, powerful, and can cut precisely through a wide variety of materials. In order to gain a competitive advantage, Dewalt came up with the FLEXVOLT Battery Technology while Milwaukee launched its M18 Fuel Technology. Both of these technologies have taken their circular saws to a new level. However, one important question arises, which of these technologies is the best? To answer that question, let’s have a look at both of these technologies and see how they are implemented into the circular saw.

FLEXVOLT Battery Technology

Back in 2016, DeWalt introduced their revolutionary Hybrid Battery Voltage Technology called FLEXVOLT. The key algorithm of this technology is pretty simple as it connects the lithium-ion cells in series for increasing voltage. So, when your tools need more amp hours than voltage, this system connects the lithium-ion cells in parallel. In short, this battery system can automatically change the output mode once it’s connected to a tool and will act according to the tool’s power requirement.


Hence, this system can hover from 20V output to 60V output to match your need. In fact, this battery technology is an optimized solution to deliver exceptional power and runtime.

M18 Fuel Technology

MILWAUKEE introduced their innovative M18 Fuel Technology with their brushless motor power tools. They are built with top-grade earth magnets and maximum copper content to ensure durability. Using this new battery technology, they reached new horizons with their 18V cordless tools. The Red Lithium Battery runs 50% cooler and delivers 50% more runtime than standard batteries. Also, the RedLink Plus Intelligence hardware and software ensure safety and durability no matter how you use it.


They brought innovations and updated technology in their battery system to deliver more power while ensuring safety features. Now, that we know the background of these technologies, let’s see a head-to-head comparison between the Dewalt DCS577B and Milwaukee 2830 to understand how these technologies are implemented.

Differences Between Dewalt FLEXVOLT vs MILWAUKEE M18 Fuel 

When it comes to determining the overall performance, the integrated motor becomes a prime area of discussion. A brushless motor consumes less power and delivers maximum output. The Dewalt DCS577B features a brushless motor with a durable magnesium shoe that ensures an accurate cut with long runtime. Plus, a blade is oriented to its left while the handle is positioned to its rear side. This design is great for an optimized line of sight for cutting. Similarly, the Milwaukee 2830 features a brushless motor that generates plenty of power and performance for a corded 15 amp-hour circular saw. Both of them rotate at 5800 RPM.

So motor-wise, both devices will deliver optimal power to match your need. However, after the motor, the integrated power source, or the battery output, becomes a vital differentiating factor. The Dewalt tool comes with their in-house FLEXVOLT Battery Technology that can deliver an output of 20V to 60V. So, a single charge can ensure the whole day’s heavy-duty cutting work effortlessly.

On the contrary, the Milwaukee 2830 comes with a Red Lithium High Output HD12.0 battery that delivers 50% more power and runs 50% cooler than standard circular saws. Plus, the Redlink Plus Intelligence system ensures optimal performance while protecting the tool from overloading issues during heavy-duty work. A single charge can ensure up to 570 cuts. In terms of battery optimization and innovation, the Milwaukee 2830 has the upper hand. But the Hybrid Battery System of the Dewalt DCS577B allows for compatibility with higher voltage.

Final Verdict

In the end, both of these circular saws are the practical implementation of their manufacturer’s innovative technology. Hence, both of them are designed to make your cutting experience smooth and more efficient. So, if you are planning to use these tools on plywood, hardboards, dimensional lumber, or even metal, you should determine the purpose of use before you decide which one to go for.

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