That’s shocking!! My plumber bought two with some mad Milwaukee SDS drill - probably a good investment for someone using them a lot. Something cheaper would work for me.
Yeah to be fair I think the big batteries are a great idea if you are running a chopsaw on site all day every day, no need to worry about lugging around a 110v transformer and having a H&S guy tell you off for making trip hazards.
Good job you aren't buying Milwaukee 12ah batteries, just the £200 or so...