Oh, so instead of using it forever, you're limited to only, say, about 25 years.
Some of you really seem to have a pathological need to invent things to complain about. I've owned my Magic Mouse 2 for about a year and a half. I use it often. I've only ever had to charge it a handful of times in those 18 months. Given that a typical battery lasts about 1000 cycles in a hot laptop or smartphone, or more, I'm quite certain this mouse's battery will outlive its useful life.
I'd joke about complaining about the wireless keyboard next, but I see someone has already done that recently on here, which almost defies belief. That needs about 2 charges a year, at that rate you may only get a few hundred years of use out of it before the battery starts to tank...
Had about enough of the Luddite insanity that seems to plague, ironically, a tech site...