[deanhills]

Thank you for posting this useful piece of information. Did not know that cordless mouses are so sensitive to electro-magnetic interference.

For me, I do prefer using corded mouses over cordless ones. I just hate dealing with batteries at all, TBH.  

Thanks for pointing this out.  I missed it.

About experiencing weird issues with the wireless mouse:
a) don't plug the USB receiver directly into the computer
b) use a USB extension cable and plug it into that cable
c) if you have to plug it into your computer try to avoid USB 3.0 ports
d) avoid pluging it near bluetooth and WiFi devices in your computer

This is an amazing tip @"Hidden Refuge".  Do you think this would be relevant for wireless keyboards as well?  As I now think this is the reason I had issues with my wireless keyboard.  I thought it was a bad connection with the battery, but it must have been the fact the USB receiver was plugged directly into the computer.  I've never used an USB extension before, so am going to check around tomorrow to see whether I can find one.  Will a USB Hub work - or does it also count as being plugged directly into the computer?