Ryobi introduced the ONE+ battery format in the mid 90s and all subsequent batteries are compatible with any tool for that format. Newer batteries use newer materials and better charges and whatnot, but it is similar to how AA batteries fit in AA battery slots whether they are lithium or whatever else they make batteries out of.
So that is one company that has had a stable battery format for about 3 decades. They do have different versions that have more stored energy, which are thicker packs, but every one fits every tool because the connection is the same.
Ryobi introduced the ONE+ battery format in the mid 90s and all subsequent batteries are compatible with any tool for that format. Newer batteries use newer materials and better charges and whatnot, but it is similar to how AA batteries fit in AA battery slots whether they are lithium or whatever else they make batteries out of.
So that is one company that has had a stable battery format for about 3 decades. They do have different versions that have more stored energy, which are thicker packs, but every one fits every tool because the connection is the same.