Can I leave the SimplyGo Mini connected to the car if I am not using the concentrator?

You can leave your SimplyGo Mini connected to the DC cord if your concentrator is turned off as this will charge the battery.

You should disconnect it if the car is turned off as it may draw power from the car battery enough to not be able to start your car.

You should also never connect your SimplyGo Mini to the car unless the car is already on.