If you are looking to add Ryobi 18-Volt ONE+ batteries to your tool collection for a great value, this Special Buy is the solution for you. Valued at over $159 if purchased separately, the 18-Volt ONE+ 4-pack. Compact Lithium-Ion Batteries work with over 70 great ONE+ tools and offer superior performance compared to Ni-Cd batteries. These compact Lithium-Ion batteries provide 20% more runtime, and are 45% lighter weight compared to the 18-Volt Ni-Cd Battery (P100). Lithium-ion batteries also provide fade-free power for maximum performance throughout the charge. Best of all, the included batteries are compatible with any green or blue Ryobi 18-Volt ONE+ tool. This Special Buy is available exclusively online while supplies last.