Putting the accelerator in neutral to charge is a mistake, because doing so will cause the engine to run at high RPM, potentially damaging the engine and transmission. The Honda Civic is a classic car, and it is recommended to use the charger to charge the battery following the instructions in the vehicle's user manual. Whether the accelerator is pressed or not has no effect on charging, and the correct charging method can effectively protect the vehicle battery and other electrical systems to ensure the normal operation of the vehicle. Therefore, we strongly recommend not to use the neutral step on the accelerator to charge the vehicle.