[silisili]

Mentioned in the comments, I looked into CAS a couple years back. Sounds great in theory, but it seems the vast majority of partners using it are for one off, specialty tools...

https://www.cordless-alliance-system.com/

[rhinoceraptor]

It's ironic, there's also a competing "standard" where Bosch licenses their batteries to smaller tool brands: https://www.ampshare.com/gb/en/

[orthoxerox]

Yes, it's basically Metabo plus lots of specialty tools companies that don't threaten but complement Metabo with their product ranges.