Meanwhile, by using conveniently placed knife-switches, the driver divides the power being generated by the turbocharger between its two outputs—one charging the battery through a coupled motor-generator, the other sending pressurized mixture to the engine’s intake system. If the turbo gets close to that 125,000-rpm limit, a deft motion of a knife-switch sends more power to the battery, lugging the turbo down. If the engine feels a bit tepid, open the battery switch for an instant to let turbo revs build, sending more combustion power through the mandated 8-speed transmission to the rear wheels. During acceleration, more knife-switch throws send battery power to the turbo’s coupled motor-generator to spool up instant boost. During deceleration, chop-chop go the switches as the driver converts the driveline motor-generator to generator mode, sending recovered braking energy back to the battery.