Re:Sirius
Indeed, it is when the game is being moved in a casino, that the game starts drawing from those batteries.
I had to consult my notes to double check. The PCI FPGA card with 2 x 3V batteries has the safestorage on board.
The VBAT stores the BIOS settings but... if the battery is quite dead, the computer could crash and then corrupt the safestorage anyway. I do not usually see a board monitor tilt for VBAT.
if VBAT is quite dead, the computer will not start at all and upon replacement, I typically see NO GAME ENABLED.
VBAT - Stores date and time ( wrong date/time [too early means the license looks like it is not yet valid ] equals license tilt )
VBAT - the hard drive uses a unique storage format, if the BIOS settings are lost, one may have to "LOAD OPTIMAL DEFAULTS" in the bios, if the computer keeps restarting to the splash screen.
I used to try and switch the BIOS battery very quickly. Now I pull the computer, turn it around and connect the power connections to it while I change the battery.