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Yes, you can operate it even with the car off. I don't have an old battery and can easily use it for an hour or so without worrying about the battery dying. Driving the car does recharge the car's battery. If you needed to use the blanket through the night, you might consider keeping another power source in your vehicle.
Sorry, there was a problem. Please try again later.Hi. Yes as long as you switched on the car to the point that the batteries are running. But I strongly suggest you start the engine to use it to prevent battery getting discharged. Hope this helps.
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