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So, I found this mouse in a goodwill for 4 bucks.I noticed that it doesent have a reciver but a micro usb in the mouse. I figured that its a charging port for the battery. i wonder, does the micro usb serve as a “alternate mouse connection to the pc to make it work?” Thanks! (also the mouse works when i put a battery on it.)

The USB was designed to recharge the battery only. But if you want to make it as an “alternate connection”, you will still need a receiver plugged into the PC. And you do not need the battery if you have it permanently on a USB cable.

No it doesn’t It need the host Bluetooth conductor to function in any way But luckily you can reprogramm it to work using any other receiver If you have any