Interchangeable 20V Batteries?

[soparklion11]

Can anyone list 20V batteries that are interchangeable? I figured out the system with older 'joystick' style batteries, but I haven't figured it out for the newer style of battery pack.

Specifically, can I modify Craftsman batteries to fit any other brands, specifically Black & Decker.

 

[Sparky617]

There are adapters that allow you to use one brand of battery pack with another brand of tool. I bought one on Amazon to allow me to use Dewalt batteries on my Ryobi tools. Allows me to continue to use my Ryobi tools without having to maintain two brands of batteries. Try Googling your specific combination.