12 V , 7 Ah Sealed Maintenance Free ( Smf ) Lead Acid Rechargeable Battery For Emergency Light Of Ac And Non- Ac Coaches As Per Rdso Specification No. Rdso/Pe/Spec/Ac/0180-2016 ( Rev. 0 ). Accepted Make : M/S Exide, M/S Tafe (Amc O), M/S Amar Raja, M/S Hbl Or Similar. As Per Specn. Rdso/Pe/Spec/Ac/0180-2016 ( Rev. 0 ) [ Warranty Period: 30 Months Af Ter The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitted: Max 8 Lacs ] ]