This CRAFTSMAN® V20* 4Ah High Capacity Lithium Battery pack provides up to 3x longer runtime of a standard V20* lithium battery. It is compatible with the CRAFTSMAN® V20* cordless power tool and outdoor tool lineup. The premium grade high performance cells provide high power and long cycle life. Each pack is equipped with a 3-LED state of charge indicator for immediate battery charge feedback. No memory and low self-discharge means this battery is ready when you are.