That being said I still think I would be worrying myself to death if there were constant changes.
That's the reason I changed to an analog voltmeter.
The digital I had was too accurate; to the 0.1 of a volt.
It was constantly changing.
My analog has a warning light built in, so that if voltage falls below 10V it'll let me know.
2013 F6B, black, with ABS
If it ain't broke, try to fix it anyways