Generally "2.4 GHz" refers specifically to a proprietary protocol that the manufacturer invented - so yes, it can save battery (and be lower latency) assuming they designed it well. And yes, there's probably no standard way to get the battery status from a USB dongle like there is from Bluetooth, so if the Windows drivers can do it, then it's their own secret recipe.
this post was submitted on 21 Oct 2025
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KDE Plasma automatically shows low battery notifications for my logitech mouse connected in non-bluetooth radio mode. It works through UPower daemon, though IDK how it gets the info.
UPD: it works through Logitech's proprietary protocol which is implemented in the kernel: https://github.com/torvalds/linux/blob/master/drivers/hid/hid-logitech-hidpp.c
Very nice find!
wired > 2.4 ghz > Bluetooth
There are limitations that make Bluetooth annoying to deal with (unable to interact with BIOS using a Bluetooth keyboard for instance)
I’m looking for the same thing at the moment, actually. I don’t know your flavor of Linux, but someone on a forum for Mint suggested an applet called Power Manager, so there’s stuff out there if you’re willing to dig a bit.
Bluetooth uses 2.4ghz and is designed for personal area networks so I would use that.