Dewalt DCB609-2 20V/60V MAX FLEXVOLT 9 Ah Lithium-Ion Battery (2-Pack)

The dual-voltage 20V/60V MAX* FLEXVOLT 9.0 Ah battery automatically changes voltage when you change tools . providing up to 6X runtime** in 20V MAX* tools and the power of corded in 60V MAX* and 120V 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.