RIDGID introduces the 18V Lithium-Ion 4.0 Ah Battery (2-Pack) and 18V Dual Chemistry Rapid Charger Kit. These 4.0 Ah batteries will provide up to 3X more runtime compared to the 1.5 Ah lithium-ion battery (AC870015). These 4.0 Ah batteries are 10% more compact and 10% lighter compared to the previous model (AC840087). The included charger is Dual Chemistry, meaning it is compatible with all generations of RIDGID 18V Batteries, including Ni-Cd and Lithium-Ion. As always, these 4.0 Ah batteries and 18V Charger are 100% compatible with all RIDGID 18V tools. Best of all, kit is eligible for the Industry’s Only Lifetime Service Agreement, simply register within 90 days of purchase for FREE Parts, FREE Service, For LIFE. This kit includes two 18V Lithium-Ion Batteries, an 18V Charger, and an operator's manual.