The RYOBI 18-Volt ONE+ System introduces lithium-ion performance at Ni-Cd prices. This 18-Volt ONE+ 2-pack of High Capacity Lithium-Ion Batteries are available as a Special Buy, while supplies last. The High Capacity Lithium-ion battery provides up to 2X runtime, holds a charge 4X longer and is 20% lighter weight than 18-Volt One+ Ni-Cd batteries. Lithium-ion batteries provide fade-free power for maximum performance throughout the charge. Best of all, like all 18-Volt ONE+ batteries, it works in every Ryobi 18-Volt ONE+ tool ever made.