Hoover® ONEPWR™ 4.0 Ah Lithium Ion Battery provides the power and performance you need without being tethered to a cord. Compact and removable design allows for easy swapping from product to product giving you the ultimate versatility to complete your cleaning routine faster and easier. Every ONEPWR™ Battery works with every ONEPWR™ product from hard floor cleaners and vacuums, to leaf blowers, hand vacuums and more.