supply of 12v, 7ah sealed maintenance free (smf) lead acid rechargeable battery for emergency light....12v, 7ah sealed maintenance free (smf) lead acid rechargeable battery for emergency light....,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). acc epted make: m/s exide / m/s tafe (amco) / m/s amar raja / m/s hbl only. [ warranty period: 12 m onths after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]