I’m throwing this in the top 10 because I think this gadget should be in every glove compartment. You never know when you need a normal plug. It comes in handly for road trips, vacations, outdoors, emergency kits and more. It’s easy to use, simply plug the 200W inverter straight into the vehicle’s cigarette lighter. It has 4 USB ports (6.2A) and 2 standard plug outlets (e.g. for laptops) for convenient charging on the road.