RIDGID introduces the AC9540 18V 4.0 Ah MAX Output Battery and Charger Starter Kit. 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 included RIDGID MAX Output 4.0 Ah battery will provide up to 3X more runtime and 2X more power compared to the 1.5 Ah lithium-ion battery (AC870015). The RIDGID MAX Output 4.0 Ah battery is compact and lightweight, which reduces user fatigue. The included 18V Fast Charger is 2X faster than the 18V Compact Charger (AC86093) and can charge the 4.0 Ah battery in under one hour. As always, the RIDGID 18V 4.0 Ah MAX Output Starter Kit is 100% compatible with all RIDGID 18V tools and chargers. Best of all, this 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. The RIDGID AC9540 includes an 18V 4.0 Ah MAX Output Battery, an 18V Charger and an operator's manual.