12 V, 7Ah Sealed Maintenance Free Lead Acid Battery For Emergency Lights Of Bhel-Ac C Oaches For Metro Railway Kolkata. The Battery Should Be Fit In The Rdso'S Drawing No. Rdso/Pe/Sk/Tl 0180-2016 (Rev.) Of Sheet 1 & 2 And Rdso'S Specification No. Rdso/Pe/Spec/Ac/0180-2016 (Rev.) [ W Arranty Period: 30 Months After The Date Of Delivery ] ]