Scored a great deal on Rapid Fire plus a spare carcass. Got it running great, after a few games it started adding extra lives(bases) during play, adds a base every thousand points or something untill it hits nine bases. This pretty much makes it infinity play.
As far as I can tell there is no setting for this,it played fine and I didn't change any settings. It doesn't seem to be scoring disproportionately, it's just adding extra lives faster than you lose them.
Any thoughts?

Gonna start by removing the original nicad battery, replace it.
Sometimes the game boots up, volume normal, this is when the game doesn't play right. Other times it boots up maximum volume and plays perfectly.