Review on Nilight 2 Pack Waterproof Car Cigarette Lighter Socket Adapter - 12V Power Outlet Replacement for Marine, Motorcycle, RV, ATV - Terminals Wires & Screws Included (2 Years Warranty) by Mike Phillips

Edit: Updated Rating to 3 Stars - One unit failed to supply proper voltage to my fridge. It took some troubleshooting to figure that out. Swapped it for a different plug and now it works. But the input jack is too loose, so I ordered it from another company. Initial review: I bought these to replace the USB port in my RV with a 12 volt outlet to power my portable fridge/freezer. I'm happy to report that installation was the easiest thing I've ever done to a van, it works great and seems to last longer than the USB port I replaced.