infinikey

Hi everyone, Just wanted to get some clarification on the infinikey vs battery subject. Not looking at cost or time or anything other then functionality. Is there any good argument for having a battery over the infinikey installed on your boards ? Like maybe hi score can save or characters...

Just picked up 3 "Junk" CPS2 Green Japanese B boards that all exhibit the same Red Screen on boot. They all power up, fan spins and what seems to be proper voltage going into them? Tested all three boards with known working A boards with the same results. Have not opened them up yet. I do have...