How Good Are DeWalt Batteries? | How Long Do DeWalt Batteries Last?

Over the years, DeWalt has released some of the best batteries for various power tools. Currently, most of their large cordless devices run on three primary voltage batteries; 20-volts and 60-volts and 120-volts. The cordless power tools were revolutionized in 2016 with the release of the FlexVolt platform.

Flexvolt batteries provide 60 volts to tools demanding high power, such as DeWalt’s Atomic compact cordless tools, work lights for the job site, and outdoor equipment. However, FlexVolt batteries can step down and run at 20 volts with low-power devices. Besides the heavy power FlexVolt provides, DeWalt still runs strong with the 20-volt MAX platform.

How to Know Which DeWalt Battery You Need

With so many batteries to select from, it might be challenging to figure out which one you need for your equipment. Worse, you don’t want to buy a battery just to discover that it doesn’t fit in your tool. Because the two power platforms are so similar, double-check that you’ve added the proper size to your cart before placing an order.

DeWalt cordless tools are mainly available in three voltages: 20 volts, 60 volts, and 120 volts. On the tool, they’re all labeled with the battery size they require. 20-volt tools may be powered by either 20v MAX or 60v MAX batteries. Only 60v MAX batteries can be used in 60 and 120-volt tools.

What are FlexVolt Batteries Fit For?

With a few exceptions, FlexVolt batteries are compatible with all DeWalt 60 and 20-volt tools.

What are DeWalt Batteries Fit For?

All DeWalt 20-volt tools, as well as all 20-volt chargers, accept standard DeWalt 20-volt batteries. As a result, once you’ve signed up for the DeWalt platform, you’ll have access to over 100 items that all use similar battery technology. However, the DeWalt 20v MAX battery will not work with FlexVolt 120v and 60v MAX tools. The lower voltage is insufficient to power the high-demand motors.

The New Dewalt 5 Amp Battery

Dewalt has finally released the follow-up to its popular 4Ah 18V li-ion batteries. When bigger capacity batteries hit the market, we ask how much additional runtime they will provide for our power tools. Then there’s the question of how long they’ll take to charge and how much heavier they’ll be.

The new 5Ah XR batteries are not any compared to the previous 4Ah models. Furthermore, the 4Ah batteries were lighter compared to the 3Ah batteries. However, Dewalt’s 5Ah 18V XR lithium-ion batteries can hold up to 66 percent more charge compared to their 3Ah counterparts, all while remaining the same size and weight. If you haven’t upgraded your 3Ah Dewalt batteries to 4Ah, now is the time to do so with the new 5Ah packs.

Which DeWalt Cordless Tools Will Benefit Most from 5Ah?

As we’ve seen in recent years, higher capacity batteries appear to be linked with brushless power tools. As a result, when these new batteries arrive on the Toolstop website, they’ll be paired with DeWalt’s brushless tools first, whether the nailer, impact driver, combi-drill, or drill driver.

Why Brushless?

These power tools are already highly efficient, so pairing them with a larger capacity battery makes sense. We don’t have any information on the predicted runtimes of these brushless, cordless power tools. Still, with up to 66% greater runtime than 3Ah batteries, you could find yourself working all day and recharging the batteries overnight.

Examples of DeWalt Lithium-Ion Batteries

DeWalt FLEXVOLT 20V/60V Max 6.0 Ah Battery DCB606

This premium lithium-ion battery has a capacity of 6.0 Ah, which is twice that of a regular battery pack and three times that of the small XR battery pack. When you switch tools, it adjusts the voltage to power a variety of 60V and 120V Max tools, as well as other equipment and chargers. It’s perfect for high-demand equipment that requires longer runtimes, like grinders and demo hammers.


  • It charges in approximately one hour
  • It has a durable construction with a single piece cell holder

DeWalt 20V Max Lithium-Ion Battery Pack 3.0 DCB200

This 20V Max Lithium-ion battery pack has a 3.0Ah extended run-time battery, allowing prolonged run time and battery life. It has no memory and no self-discharge, resulting in little downtime and maximum production. These battery packs are incredibly light, weighing only 1.6 pounds, allowing the user to get the most out of their run time while experiencing minimal fatigue.


  • It has a 3-LED fuel gauge system to give you instant feedback on the charging state
  • It has no memory and self-discharge for less downtime


  • It is heavier than its counterparts, the 4.0Ah and 5.0Ah

DeWalt FLEXVOLT 12.0 Ah Battery

DeWalt’s Flexvolt battery platform is a relatively new product range. It’s pretty different from what the other tool manufacturers are doing. If you’re new to the Flexvolt series or just want to learn more about how they operate, keep in mind that they’re rather unusual. Here’s how they function:

The lithium batteries we use in our cordless tools are made up of several lithium-ion cells (batteries) stacked on top of one another in a plastic casing, as we all know. When these cells are connected, a larger battery is formed. The voltage of the battery is determined by how they are connected.

The DeWalt Flexvolt 9.0 Ah battery housing comprises three rows of cells, each with five cells. Because each cell has a voltage of 4 volts, connecting one row of cells results in 20 volts. The more rows you connect, the more Amp Hours the batteries have (Ah). When the Flexvolt battery is configured in this manner, it is said to be in parallel mode.

If you connect all 15 cells instead of just one row, the voltage will be 60V, but the Amp Hours will be split by three since these batteries are no longer operating as three rows as indicated before but as a single row. The Flexvolt battery is regarded to be in series mode when set up in this manner.

Your next inquiry should be: how does the battery determine what voltage it needs to be and how does it transition between the two? It’s here where the magic happens. Essentially, the gadget will determine the voltage of the battery. When you insert a 20V Max battery into a tool, the electrical connection between the device and the battery tells it to set up in parallel. If the battery is inserted into a 60V Max tool, it will automatically be set up in series.

How Long Do DeWalt Batteries Last?

It is debatable. Several factors will determine the length of a charge and the battery’s life. User behavior, environmental temperatures, storage habits, and capacity are all aspects to consider. Do you toss it into the same toolbox where you keep your saws, hammers, and screwdrivers? It’s best to keep it in its original carrying case or padded bag. DeWalt offers a three-year warranty on its lithium-ion batteries. However, you may expect them to live considerably longer if you take good care of them.

DeWalt Battery Storage and Safety Tips

Here are our top 10 suggestions for getting the maximum performance and runtime out of your DeWalt Lithium Ion batteries:

  • For the greatest performance and safe compatibility with DeWalt tools and chargers, use only genuine DeWalt batteries.
  • Batteries should be stored and charged in a cool, dry environment.
  • If your battery is no longer charging, bring it to a DeWalt Service Center near you for a quick, free, and secure disposal.
  • Batteries should be cleaned using a clean, slightly moist cloth rather than chemicals.
  • Observe all transportation regulations. When shipping FlexVolt batteries, for example, use the red transport cover.
  • Before storing the tool for a lengthy period, disconnect the battery.
  • Batteries should not be exposed to liquids, oils, or high temperatures.
  • Before storing for lengthy periods, fully charge the battery (longer than six months).
  • Batteries with obvious damage or cracks should not be used.
  • If you need assistance with your battery, go to a DEWALT Service Center. You should not attempt repair or service.

Final Thoughts

Like DeWalt equipment and power tools, their batteries have a similar reputation. Thanks to the introduction of the FlexVolt platform, DeWalt’s products and batteries are continually gaining a reputation. Whether robust or not, the batteries take a reasonable period to charge and work for a long period throughout their 3-year expected lifespan.

James Thomas

James Thomas

Tool Enthusiast

Leave a Comment

Your email address will not be published.