New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging . Dual 110V AC outlets deliver 300W continuous power to your electric appliances under 300W like laptop, TV, game console, DVD/Blu-Ray player, and 2 USB ports can charge mobile devices like cellphones, cameras, etc. So we need power not only the DC power but also the AC power to juice up electronic devices for mobile fun no matter where we are. You know trains now all come with plug sockets to charge your laptop and while you can’t use your laptop if you’re driving but it gives you suddenly can if you’re a passenger. It is going to be a pretty narrow use case as we generally don’t have a normal plug socket outside of home or the office so we don’t expect there to be.

Sure, the USB sockets are a nice addition but you can get a million USB car charger but a laptop one I have never seen before. Actually, its edges could do with being a little rounded as its going to mostly deep in the passenger foot well where you can easily bump your feet.

And if you had a big inverter supplying a smallish load, the inefficiency is greater as there is a minimum amount of overhead - so if you had say a 2000W inverter for arguments sake and you turned it on to provide a low wattage, it would be more wasteful than using a 300W inverter for the same purpose.

inch cigarette lighter plug makes the power inverter compatible with almost any vehicle and convenient for anyone in the car to use the power supply.Unique vents and smart fan design make our 300W power inverter easier to dissipate heat, and cigarette lighter plug is easy to plug into a cigarette lighter socket. If Radio Shack determined you should only run 140w through the cigarette lighter, then I'm not sure that plugging the clamps into the cigarette lighter increase safe capacity. From the perspective of mainstream inverters, car inverters are mainly divided into two types, pure sine wave inverters, and modified sine wave inverters.