No CPU "reset" is required for your car.
Your vehicle's battery is located in the trunk. Renewal requires removing the trunk floor mat, disconnecting the negative and positive battery cables, removing the one bolt securing the battery tie down clamp, disconnecting the vent hose and removing the battery. Installation is the reverse, plus entering the radio code.
This task can be completed, at a leisurely pace, in less than five minutes.
Perhaps the dealer has a minimum labor charge... but "resetting" the computer is bogus.