I have bought a Bluetooth mouse. This one goes into sleep mode if I don't used it, say, about 3 minutes. Then just moving the mouse doesn't wake it up. I have to click a button. After clicking a button, it takes about 3 seconds before the mouse cursor moves.
I am considering a new one. There...
I have been using Microsoft wireless mouse for a long time (like 5 years). I could feel really slight delay when I move it after I didn't use the mouse for a very long time (like a few hours).
Now, I bought my first Bluetooth mouse few weeks ago, and it falls into sleep mode if I don't use it...