Professional Replacement Battery: Replacement for Worx 40V Max Lithium battery WA3580. Upgraded 3.5AH delivers extend run time. Note: Not fit for Worx 2x20V tools.
100% Compatibility: Perfectly compatible with Worx 40V power tools WG180, WG280, WG380. Fits 40v battery charger WA3747
Premium Lithium battery cells, lighter and more efficient, can be charged with no memory effect. Designed with LED indicator to check battery power level conveniently
Safe and Reliable: Built-in protection protects the battery from short-circuit, overcharge, over current and over temperature to extend your battery life.