12V, 7Ah Sealed Maintenance Free ( SMF ) Lead Acid rechargeable battery for emergency light of AC & non- AC coaches as per RDSO specification no. RDSO/ PE/ SPEC/ AC/ 0180- 2016 ( Rev. 0 ). Accepted make: M/ s EXIDE/ M/ s TAFE ( AMCO )/ M/ s AMAR RAJA/ M/ s HBL only.