20/60V MAX* Flexvolt Battery

The dual-voltage 20 V/ 60 V MAX* FLEXVOLT® 9.0 Ah battery automatically changes voltage when you change tools, providing up to 6X runtime** in 20 V MAX* tools and the power of corded in 60 V MAX* and 120 V MAX* tools. Take on tough jobs with this battery because patented technology and large format cells mean it runs cooler*** than the leading competitor 9.0 Ah battery pack under a constant discharge. This is the battery for FLEXVOLT® power and long runtime.