Fein Power Tool Batteries & Chargers Tool battery 615570 - Fein 92604345020, The Fein GBA 18V 4.0Ah AS tool battery, model 92604345020, is a reliable lithium-ion power source for Fein power tools. With a capacity of 4.0Ah and a voltage of 18V, it provides enhanced performance and longer runtime for demanding tasks. This Fein tool battery is ideal for various construction and DIY applications where consistent power is essential. Fein 92604345020 Battery 18V 4.0Ah Li-ion with SafetyCell Technology.