Features the power of corded with the freedom of cordless. The 20v/60v Max battery pack changes voltage when you changetools, powering a line of powerful 60V Max tools, 120V Max tools and backwards compatible to existing 20V Max tools andchargers. The battery pack is smart enough to know when to provide runtime for 20V Max tools (6.0Ah) and power in the new 60V max and 120V Max tools. LED state of charge display. Durable construction with a single piece cell holder.