Question BIOS Loses Configurations If Disconnected From Power

[musclemuffins]

I have a Asus Z170i Pro Gaming motherboard that seems to be otherwise completely functional, but it only retains BIOS settings as long as it's connected to a power source. If I unplug the power or switch off the power supply, all my BIOS settings are lost.
I tried another CMOS coin battery from another ITX motherboard I had, but that wasn't successful. I've also made sure the clear CMOS header wasnt connected.
At this point I only have three guesses:

1. both batteries were too low of a voltage
2. the first battery was dead, and the second battery has swapped red/black wires causing issues (its the coin battery connected to the motherboard via the twisted black/red wires)
3. physical defect in motherboard

Eh?

Edit: also tried updating BIOS and resetting BIOS settings.

 

[Remeca]

Just need to get a new CMOS battery sounds like.