> I've seen power tools from certain companies adopt the same battery type across multiple of their tools That's because electric power tools are sold as a pla

> I've seen power tools from certain companies adopt the same battery type across multiple of their tools That's because electric power tools are sold as a platform: you choose a brand and buy in to their platform. For example I mainly use a driver + drill so bought in to Milwaukee. Ended up buying a lot of other kit from them too.