I buy this item after read all the review , so here be mine ... you will be underwhelm , but no more so than any other 12v plug-in . the amount of suck be proportional to the amp draw from you battery , and I be guess that the manuf have agree how many amp it be ok to draw - wire thickness , etc. . but I do like the thoughtful design of the pull-out end on the suction wand , the compact fold-up and the nylon case . and despite as have be point out , this be not a truly centrifical vac , the filter clean out easily . I use it on my pontoon and it can suck up sand , etc , but I be on my hand and knee cover pretty tight back and forth to get everything . I wish I have 110v and esp 13a @ 110v but I do not , so I have to make do with a 12v plug-in . if I do have 110v I would say that all 12v hand-held be light-weight . but for I and my pontoon down by the lake it be probably as good as it get , so this vac have my vote give the limitation . PS - you can make it run a little faster by run you engine to boost batter voltage .