@ Amphibious54- I second your opinion about a power inverter being a great purchase. I work on the road, so it helps to be able to charge my phone and run my laptop. A piece of advice to anyone thinking about getting one, make sure you don't cover your inverter with clothes or anything else. It can make your inverter overheat; causing damage to your inverter or your electronics.
They also say to unplug them when the car is not running because they can drain our battery, or overheat. Some of the inverters on the market are fused and will automatically turn off when your car shuts down, but I think it’s still better to be safe and unplug them.