Titan Two Way Radio Battery BP36257 Fits Vertex FNB-V57 NiCD Replacement Titan BRAND - 18 MONTH WARRANTY Guaranteed to meet or exceed the original equipment manufacturers specifications High impact ABS and Polycarbonate plastic polymers for ruggedness Comprehensive testing including high altitude performance, vibration, mechanical shock, thermal cycling, external short circuit and overcharge test simulations. Strong - Durable - Reliable Plastic Housing