ST Microelectronics M4T28-BR12SH1 TIMEKEEPER SNAPHAT BATTERY

 These are used to hold the settings on many arcade games such as the Cruisin series.  

If you have to redo the steering and pedal calibrations each time you turn the game on then there is a good chance you need to replace your old battery.

Pcb in picture is not included in listing, only used to show location and use of this battery.