The SPS does not store the map, it is merely the interface that Revo use to adjust their map. the SPS allows the user to store predefined map settings (boost, timing, fuelling) in addition to switching between Revo stock and performance modes and the anti theft enable/disable. Disconnecting the battery I'll not lose the map, merely revert to Revo stock and need the ps to switch back to the performance map and correct settings.