Nilfisk do make a battery cordless version but run time is only about 30 minutes so not much good, price is also about £800.00. You can pick up a decent backpack for about £200.00. I use mine for all regular commercial accounts. I have tried most makes of backpacks, Nilfisk backuum is extremely powerful and fairly lightweight, my staff like it but is quite pricey. Tennant I sent it back cord was not long enough and not powerful enough for me. Truvox not bad, found it lost power very quickly when bag got dusty and the bags were not easy to use. My favourite is the hypercone, plenty of suction, no bags to use, good price. These are of course only my opinions, you need to check around and find the one that suits your needs best.
