Compact, cordless and 25% lighter weight, the Hoover Commercial 40V Brushless Backpack increases productivity by improving staff efficiency. Every new Hoover Commercial 40V battery works with every Hoover Commercial 40V cleaning product so you get a completely integrated cordless system that allows staff to seamlessly swap batteries.Works with Hoover 40V Batteries: CH27280 40V 8Ah and CH27312 40V 12AhWorks with Hoover 40V Chargers: CH07150 Single-Bay and CH07250 Dual-BayBatteries and Chargers sold separately