Have in the past years got rid of all cabled accessories to my gaming pc and the reduced cables is rather nice. However there is one thing im not sure of, should i connect my accessories over 2.4ghz or Bluetooth? Which is better for battery lifetime? AFAIK; 2.4ghz is superior when it comes to latency. The only reason im asking is because I started looking into how I can track the battery status of my devices, which doesn’t seem to be possible/rather difficult (on Linux) over 2.4ghz.
Keyboard: Keychron K5 Max Mouse: Lamzu Thorn
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.
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!