DeWalt 20V-60V Max FLEXVOLT DCB606-2 6 Ah Lithium-Ion Battery Combo Pack 2 PC

The DCB606 20 V/ 60 V max battery pack changes voltage when you change tools powering a line of powerful 60 V max tools 120 V max tools and backwards compatible to existing 20 V max tools and chargers. The battery pack is smart enough to know when to provide runtime for 20 V max tools 6.0 Ah and power in the new 60 V max and 120 V max tools.