... ,70min. continuous working time 4,plastic or aluminum tank Battery backpack vacuum cleaner VC60B1,36V,600W2,6L capacity3,70min. ... ideal for schools,commercial offices,department, stores, hospitals, institutions, airport terminals, churches, hotels and motels, restaurants, bars etc. And the ... them easy for anyone to manage. The Lithium Ion battery will give you full 70 minutes of continuous run time ...