supply of sealed maintenance free valve regulated lead acid rechargeable batterysealed maintenance free valve regulated lead acid rechargeable battery,sealed maintenance free valve regulated lead acid rechargeable battery of normal voltage 12v,nominal capacity of 7 ah, suitable for use emergency light unit of lhb & sg type in non-ac coaches as per rdso specification no.rdso/pe/spec/ac/0180-2016 (rev.0) or latest. (makes are as per bill of material in specification):- m/s.exide, m/s.tafe(amco), m/s. amar raja, m/s.hbl only. note: one sample should got a pproved before bulk supply [ warranty period: 30 months after the date of delivery ] ]