Slightly moving high dpi mouse prevents executing single and double clicks normally on 4k laptop

Look like damage in button microswitch (I dont know english term for that. "rattle" or i miss?)

Some peoples can dizassemble microsvitch and fix it. Or it can be replaced (soldering) from different mouse.

• DPI. This refers to the amount of movement in the mouse that corresponds to an amount of movement in the cursor or whatever is being controlled by the mouse. This is useful for different applications, but commonly used in games, where you may want fast movement for run-and-gun and slow movement for sniping, where you want fine control. So a lower DPI means more mouse movement for a given movement on screen. It could be useful on a small desk, but try it first, as a higher DPI means a finer level of control is required. This can become tiring for normal work.

• Weight. This is about choice more than anything. The differences in inertia due to different masses in the mouse means a different level of force required for it to move. Again, this can help when doing fine control stuff, as you don't want the mouse skittering around when doing pixel level activities - so a heavier mouse could help. Very subjective.

• Wireless mice come in two main flavours, 2.6ghz and bluetooth. Both require batteries or charging from time to time. Bluetooth is sometimes preferred with laptops if it already supports bluetooth, so you don't need to sacrifice a usb port for a mouse usb dongle. Otherwise there isn't much benefit in bluetooth imo.