How long have they been using the laptop power chips in the Mini?
Forever...
The original G4 Mini used a PPC 7447a which was the same chip used in PowerBooks at the time.
The 2014 Mini used the
i5-4278U - again, described as a mobile chip by Intel - part of the same U-prefix (indicating power consumption) series used in many MacBooks at the time.
The
2018 Mac Mini (everymac.com) used the
i3-8100B (intel.com) (or i5-8500B, or i7-8700B) which Intel marketed as a mobile chip (look under "vertical segment" in the Intel specs) - not to be confused with the
i3-8100 which they list as a
desktop chip - but if you l
ook at the comparison the 8100B is virtually identical, actually very slightly more powerful (supports faster memory) and lists the same 65W TDP - and the "mobile" bit seems to come from the fact that it is surface-mount only, not socketed...
The take home from this should be that the "class" of processor can be pretty arbitrary, and not what distinguishes a laptop from a desktop - "mobile" processors get used in desktops (especially quiet/small-form-factor machines) all the time - and vice-versa in some "mobile workstation" PCs. The biggest disadvantage of Intel Minis were that they were knobbled by the very limited Intel
The major selling point of Apple Silicon was that - whiie it certainly grew out of mobile technology - it offered low/mid-range "desktop" CPU and GPU performance on a single chip with mobile-friendly power consumption and didn't
need separate desktop and mobile versions. All of the desktop Macs got a significant performance boost when they moved to Apple Silicon (even the Mac Pro got a CPU boost, although the inability to take $5000+ workstation GPU cards and 1.5TB of RAM was an issue there).
Actually, as far as I know, the iMac had been using “laptop” chips throughout the Intel era, too. The only Intel iMac to use a proper “desktop” chip was the iMac Pro.
...that wasn't just a desktop chip, it was a
workstation class Xeon space heater.
However, if you look up the iMac processors on the Intel website, you'll see many of them listed as "desktop" (e.g. the 2020 i9-10900 or the 2017 i7-7700). Life's to short to look them all up and it wouldn't prove/disprove anything if some of them were "mobile class".
What the iMacs
did have was - mainly - mobile-class discrete GPUs - which is why the integrated GPUs in Apple Silicon can compete until you get into Mac Pro/Workstation-class GPU territory.
In this case, “laptop” is as much about heat management as it was about power consumption.
A distinction without a difference - power consumption (Joules/sec) = rate of heat output (Joules/sec). Computers are basically just room heaters with useful side-effects.
Haha. It needs the battery to be able to move it without accidentally ceashing it, to bring it with you to work easily without having to shut down, to use it on the train, bring out to backyard, etc.
Use a Mac Mini on a train? Seriously? ...this sort of thing is the reason you are attracting so much ridicule here. I mean, you
could get one of those portable, battery-powered displays, hook up a HDMI cable and somehow juggle that and a keyboard, but there is a proper tool for that sort of thing and it is called a
laptop.
You're basically asking for a heavier screwdriver so you can use it as a hammer.
(...and even with a laptop I'd make sure everything was saved, discs properly dismounted etc. before transporting it - I don't recall ever pulling the power plug out of a desktop, but I've
certainly had laptops crash when I've plugged/unplugged an external display).