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Message: <blockquote data-quote="dedede" data-source="post: 337208" data-attributes="member: 2393">Cordless vacuums are rare due to the power requirements. A low power dirty air corded vacuum uses 500 watts. A 500 watt hour battery (one which could run at 500 watts for an hour) would weigh about 8lbs and cost at least $200 (so, at vacuum markups that's $500 or more for the consumer).And no one would buy that because we're so hyped on low weight.It looks like riccar has dropped the power to probably 120 watts. Which is probably good enough, especially for surface cleaning. So their battery probably only adds a couple of lbs.I think it looks quite cool, but it's not a solution for those on a budget. Battery prices and energy density are consistantly improving though. So, some day you will trade your cord in.</blockquote>