In the realm of all things pretty good comes the Duracell Powersource Mobile 100 power inverter and battery backup system.

Maybe more than pretty good, the Powersource crosses over to “good” now that the price has come down from a whopping $139.99 to just over $50.

The Powersource Mobile 100 gives you a three-prong plug and two USB ports to charge your laptops, cell phones, iPods, and just about any other portable device up to 80 watts. It’s guaranteed to work with iPods, Palm devices and BlackBerry phones and will work with most others as long as they take USB or standard “wall socket” power.

The device advertises two hours of laptop power, and that’s definitely possible with modern, low-power computers with the monitor turned down. Like anything else — if you’re running an Alienware monstrosity laptop, you’re not gonna get a lotta juice.

So I tested this puppy out, and my favorite part about it is that it’s not just a battery but a power inverter too. This means I can plug it into the car socket and run my Laptop at full power for as long as I need it. As a news reporter, that’s a invaluable asset on the road.

I’m glad the price came down on the Powersource Mobile 100. $50 is just about right for this product. It’s about double the cost of a normal power inverter and gives you a boost in your laptop bag or suitcase.

This is a great impulse buy. If you’re looking for something to put in the car, it’s a great idea. It works as advertised.

Yes, the Powersource is a toy. It’s not entirely necessary. It’s extra. I like it. Would I necessarily go out to the store and buy one?

I dunno.

About The Author

John Guilfoil is the editor-in-chief of Blast: Boston's Online Magazine and the Blast Magazine Network. He can be reached at [email protected]. Tweet @johnguilfoil.

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