There's Actually a Way to Mix and Match Your Cordless Tool Batteries

We may earn a commission from links on this page.

When shopping for cordless power tools, you'd think you could simply purchase the best option of each to fit your needs. But there's a big problem that makes this a lot harder (and more expensive) than it should be: battery incompatibility. By design, you can’t simply pop a Ryobi battery into a DeWalt tool and expect it to work. Engineering decisions aside, using proprietary batteries allows companies to create a sort of obligatory brand loyalty, forcing you to stick with their line of tools unless you want to invest in a whole new set of batteries for every new tool you buy.

If you've been building your cordless tool collection for some time, you may wind up with four or five different chargers and multiple batteries cluttering your workspace. And that clutter can be expensive, because you wind up buying more chargers and batteries than you might not need if batteries were interchangeable.

But it turns out they are, sort of. You can actually swap batteries between brands—you just need the right adapters.

Adapters let you swap tool batteries between brands

There are two kinds of battery adapters to consider:

• Inter-brand adapters allow you to use one brand’s batteries in another brand’s tool (like DeWalt batteries in Milwaukee tools).

• Voltage adapters allow you to use a different voltage battery than the tool expects (say, a 20-volt battery in a 18-volt tool).

These adapters are a fairly simple solution to the problem of incompatible battery systems. If you have a lot of DeWalt tools, for example, you can purchase a Milwaukee tool without a battery (which will be cheaper) and just use an adapter to plug in one of the DeWalt batteries you already have.

Of course, these batteries weren’t specifically designed for these tools, so there can be some trade-offs. While tool performance has been found to be broadly similar (and some tools even performed better when using batteries from different brands), for some tools (like grinders and some circular saws) there’s a dropoff in power and performance when using an adapter. That said, you might not notice it if you're just looking to tackling simple DIY projects around the house.

Another caveat to consider: You might lose some features. Some tools are designed to communicate with the battery to modulate power draw in order to extend the life of the battery, and using an adapter will remove this functionality. But again, if you’re simply using a power drill for basic maintenance tasks, this might not be a huge issue for you.

Universal adapters are a good solution if you own a bunch of brands

If you’ve got a bunch of disparate tool brands, of course, buying multiple adapters might not seem like much of an improvement over your collection of batteries and chargers. If this is you, consider something like the Ceenr PDNation Universal Battery System, which provides an 18-volt battery and a series of adapters that allow it to be used in a wide range of power tools, including major brands like Ryobi, Milwaukee, and DeWalt.

For example, you can buy a battery with an adapter for DeWalt tools, then buy a second adapter for the same battery that will work with Makita tools. This means you can standardize on one battery system for pretty much any tool you buy (it’s not a truly universal system, since you’re dependent on the range of adapters they offer, but it’s probably close enough for most people).

As with other adapters, there can be some performance loss using a universal adapter, but by and large, it’s probably not a big issue if you’re doing work around the house, as opposed to working professionally on a job site.

View the full article