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Jak K. It doesn't suck is very well as I thought it was going to be but. And also it loses a lot of pressure so it really doesn't sustain a lot of pressure inside of a cylinder I still think that the hand pumps are better but the vacuums really nice when you don't have to hold it by hand but it loses pressure.
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Thomas W. During assembly, the battery leads were put in incorrectly. I can only use it when plugged in.