Erroneous Low Mouse Battery Message

I sold my 2018 Intel Mac mini to a friend a few months ago and she is asking me about a strange message she is getting. The message is:

Mouse Battery Very Low

Connect to USB to recharge soon.

This would be an understandable message if she were using an Apple rechargeable mouse, but she is using a non-Apple mouse with regular alkaline batteries. Nonetheless, she put fresh batteries in this mouse and is still getting the message. My guess is that she has the wrong mouse driver installed. Can anyone confirm this and explain how she can install the correct driver, all while using her current mouse? (I could lend her a wired mouse if necessary while doing the new driver installation).

If the driver is not the problem, can anyone offer another explanation and explain how to get rid of the message?