Improve cleaning performance with this 40-volt lithium-ion battery. A 45-minute runtime keeps the cleaner running smoothly through long workdays. This Hoover M-PWR 40-volt battery is easy to change for rapid turnarounds and comes with a charge level gauge and protection system to ensure minimal downtime. Battery Type: Lithium-Ion; Battery Size: 40 V; For Use With: Hoover CH93406 Cordless Backpack Vacuum Cleaner; Voltage: 40 V.