1.high performance and high quality 2.0%mercury, 0%Cadmium,0%lead 3.OEM is available 4.CE&ROHS&SGS approved 5.4LR25 4LR25 BATTERYNormal Voltage: 6VSize:66*66*111mmWeight:700gShelf life:5 yearsJacket:Aluminum FoilCertification: ISO9001:2000,CE,ROSHDischarge Performance : contact us. 4LR25 battery