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Kensington 33362 Ultra Portable Power Inverter 150 Feature: Plugs into a car's cigarette lighter or airplane's Empower port Provides up to 150 Watts of AC power (120 Watts of continuous AC power) Bright LED Indicator - warns you of undesirable operating conditions Built-in Safety Features - over current protection, low and over supply voltage protection, and over temperature protection Average Rating: 4.0 Average Rating: 4.0 out of 5 Price: $59.99

Customer Review of Kensington 33362 Ultra Portable Power Inverter 150 by Dav3d
Customer Rating 4 of 5
Customer Summary Great device!
Customer Full Review I am very happy with my Kensington Inverter and recommend it highly. It has served me well on many road trips and airline flights.

Having a 3-prong outlet makes this a far more versatile and useful device than inverters that just have a tip for the laptop. It is by far one of the lightest devices of its kind that I have found and great for travel.

There are a few tricks of the trade when using these kinds of devices. One is that airline "empower" ports only put out 75W--and if you read the fine print it can get shut off abruptly at any time during the flight with no warning.

There ar a number of laptops that require more power than 75W--particularly if you are trying to charge the battery at the same time. No inverter can help you solve this problem but it is something to be aware of. In many cases you can either remove the battery or connect it and let it fully charge up before you turn the machine on and it will work fine.

And finally the box says 150 watts, but this is *peak* power which only lasts for a short time (such as the startup phase for your laptop). Sustained output is 120 Watts--just something to note in case you are runnign devices that require that reuqire a lot of juice.

But all in all this is a *great* little device and I recommend it highly.