I have something similar to this. One less thing to take up a lot of room and plug-in. It uses the same batteries as my tools. I bought it to use at work when I was building out closets because there's no light. It's to the point where almost all tools are battery operated now - except maybe table saw, compressor, big miter saw. I have a battery powered nail gun but I don't use it all the time because it's too heavy. But If I have to do something quick, it beats the hell out of hauling around a compressor and hose.
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It's come in especially handy during power outages at home. You can plug a phone charger into it. Of course the catch is you have to already own the wildly over-priced batteries that for reasons none of us understand cost more than the tools themselves. You steal a contractor's batteries, it's like horse thievery in the old west - get a rope.
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