RIDGID introduces the 18V Lithium-Ion MAX Output (2) 4.0 Ah Batteries and (2) 2.0 Ah Batteries. MAX Output Batteries are RIDGID’s most powerful and longest running batteries. Pair MAX Output batteries with RIDGID tools for maximum power in any application. The advanced electronics in MAX Output batteries enable users to power through the most demanding applications on the jobsite. The RIDGID MAX Output 4.0 Ah battery will provide up to 3X more runtime compared to the 1.5 Ah lithium-ion battery (AC870015). Its compact and lightweight design reduces user fatigue. The RIDGID MAX Output 2.0 Ah battery will provide extended runtime compared to the 1.5 Ah lithium-ion battery (AC870015) while being compact and lightweight, reducing user fatigue. As always, these RIDGID MAX Output Batteries are 100% compatible with all RIDGID 18V Tools. Best of all, these batteries are eligible for the Industry’s Only Lifetime Service Agreement, simply register within 90 days of purchase for FREE Parts, FREE Service, For LIFE. This battery kit includes two 18V Lithium-Ion MAX Output 4.0 Ah Batteries and two 18V Lithium-Ion MAX Output 2.0 Ah Batteries. Charger sold separately.