DeWalt and Milwaukee are two of the most popular tool manufacturers in the U.S., and each has its own battery system. How do the two really differ, though?

Lowe’s Home Improvement is doing a hot free-battery-with-tool deal to compete with Amazon Prime Days. Right now, when you get certain DeWalt 20V Max XR power tools, you also get a free 20V Max 5 aH ...

With adapters, you can often use Milwaukee, Ryobi, Makita, or DeWalt batteries across brands, but they carry risks like safety issues and voided warranties.

DeWalt’s 20V Max XR 8Ah Battery is on sale for just $109—that’s 39% off the original $179 price tag. It boasts 6,500-plus five-star ratings on Amazon, and it's easily one of the all-time bestsellers ...