Spec Sheet Preview: The Alpha Communications® model FZ151 inline fuse holder and 4 Amp (model# 50T-4A) fuse is used primarily with our nurse-call and emergency-call systems when using the BA001 (or equivalent) batteries for battery back-up capabilities. Typically it can be used with our AlphaEcall™, CM800, DS100, NC110N, NC150N, NC150R, NC200N and other similar systems when using the BA001 (or similar) batteries. Whenever using the BA001 batteries with a battery charger, it is highly recommended that t …