DEWALT FLEXVOLT 20 Volt/60 Volt MAX Lithium-Ion 9.0 Ah Tool Battery (2-Pack)

FLEXVOLT 20V/60V MAX batteries provide the highest capacity of any battery on the DeWalt cordless system. They change voltage when going from 20V MAX to 60V MAX tools and is compatible with a variety of 20V MAX tools and chargers. In 20V MAX tools it will provide extended runtime. In 60V MAX it will deliver cordless 60V MAX power.