Want to add a cig charger inside-ideas?

I had a 12v outlet installed in the base of our bed especially for my cPAP. Is connected directly on the 12V side of the converter, therefore directly to the batteries. It has a fuse installed directly in-line. That is what I would do, an extension cord for 12v is available, but is not recommended. But, be advised to use a Power Port instead of a regular cigarette lighter outlet. The power ports are available at most Auto parts places and are designed to be just that, and are more durable that a lighter type plug.