RIDGID introduces the 18V MAX Output 4.0 Ah 2.0 Ah Batteries and Charger with FREE 18V Brushless Cordless 4-Mode Impact Driver. MAX Output batteries facilitate battery and tool communication unleashing the full potential of any RIDGID 18V Brushless Tool providing more power and more runtime. The 4.0 Ah MAX Output Battery will provide up to 3X more runtime compared to the 1.5 Ah lithium-ion battery (AC870015). The Advanced Intelligent Electronics in MAX Output batteries enable users to power through the most demanding applications on the jobsite. RIDGID MAX Output batteries are compact and lightweight, which reduces user fatigue. RIDGID’s brushless motor technology delivers maximum performance and longer runtime. This powerful brushless motor delivers 2,400 in./lbs of torque and 40% faster driving when compared to the 18V 1/4 in. Impact Driver (R86002). As always, RIDGID MAX Output batteries are 100% compatible with all RIDGID 18V tools. Best of all, this set 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 a 4.0 Ah MAX Output Battery, a 2.0 Ah MAX Output Battery, 18V Charger, and FREE 18V Brushless Cordless 4-Mode Impact Driver.