Blackdecker dustbusters blackdecker nw4820n gb the nw4820n gb dustbuster from blackdecker is a lightweight 48v cordless vacuum cleaner which can clean up both dry and wet spillages iit is ideal for use in humid areas such as bathrooms or kitchens and can vacuum up spilt drinks as well as dry vacuuming of dust dirt and debris its lightweight cordless technology provides grab and go convenience and its quick release bowl is easy to empty blackdecker nw4820n wet amp dry dustbust