Size:1 Pack The DCB606 FLEXVOLT 20V/60V MAX 6.0Ah ( With DCB606 FLEXVOLT
battery when used with DEWALT 20V MAX tools compared to DCB201 1.5 Ah battery
pack.) Battery pack changes voltage when you change tools, powering a line of
powerful 60V MAX tools, 120V MAX tools, and backwards compatible to existing
20V MAX tools and chargers. The DEWALT 20V MAX battery pack is smart enough
to know when to provide runtime for 20V MAX tools (6.0Ah) and power in 60V
MAX and 120V MAX tools.