I bought this for a 4x4 camping trip in Death Valley this winter, to keep the other half warm and happy in our camping van. I have ample battery capacity to run the blanket all night, and a battery disconnect so that the starter battery wouldn't be drained by the blanket.

It worked great for the first two nights, but halfway through the second night, it suddenly stopped working in the middle of the night. It never did start working again. The red light on the cigarette lighter lights up, and when pressing the button on the control box, you can hear the relay click on, but the blanket just does not generate any heat. A real disappointment.

Also, as a side note, the blanket is designed with an auto off timer. It turns itself off automatically every 30 or 45 minutes, depending on how you set a switch. My plan had been to set the other half up with the blanket, and if she woke up cold in the middle of the night, she could bump the blanket for a bit of heat.

When it did work, it worked really nicely, though. The power cord is nice and long; it was able to (just barely) reach the bed at the back of my standard length ford cargo van. The blanket has a nice texture, didn't feel cheap, and also the electronic part of it didn't feel too obtrusive. If the blanket had worked out, I was intending to put in a new cigarette lighter in the sleeping area for it.
I bought this for a 4x4 camping trip in Death Valley this winter, to keep the other half warm and happy in our camping van. I have ample battery capacity to run the blanket all night, and a battery disconnect so that the starter battery wouldn't be drained by the blanket. It worked great for the first two nights, but halfway through the second night, it suddenly stopped working in the middle of the night. It never did start working again. The red light on the cigarette lighter lights up, and when pressing the button on the control box, you can hear the relay click on, but the blanket just does not generate any heat. A real disappointment. Also, as a side note, the blanket is designed with an auto off timer. It turns itself off automatically every 30 or 45 minutes, depending on how you set a switch. My plan had been to set the other half up with the blanket, and if she woke up cold in the middle of the night, she could bump the blanket for a bit of heat. When it did work, it worked really nicely, though. The power cord is nice and long; it was able to (just barely) reach the bed at the back of my standard length ford cargo van. The blanket has a nice texture, didn't feel cheap, and also the electronic part of it didn't feel too obtrusive. If the blanket had worked out, I was intending to put in a new cigarette lighter in the sleeping area for it.