As the years have worn on its gotten better. Still not great yet, and interoperability would be even better... but I have standardized on the 20V line from De Walt and have a number of hand, larger power, and yard tools that all use the same batteries. I buy a new battery or two every year and cycle out the oldest one (sell at steep discount on CL). Been doing that for 6 years now, and I don’t see them discontinuing the 20V line for years.