Hoover LINX Rechargeable Lithium-Ion Battery, BH50000: * Interchangeable battery powers the both the Hoover LiNX Cordless Stick Vac and Hoover LiNX Cordless Hand Vac * 18 Volt Lithium-Ion Battery * Battery runs without slow fade of battery power * Charges in just 3 hours * Charge and recharge hundreds of times without diminishing run time or performance * Energy Star Rated