supply of sealed maintenance free valve regulated lead acid rechargeable battery of normal voltage 12 v, nominal capacity of 7 ah suitable for use of emergency light unit of lhb type ac coaches (test certificate to be enclosed along with batteries). the battery shall not be more than 2 months old from the date of manufacture, at the time of supply. acceptable makes as per bill of material rdso/pe/spec/ac/0180-2016 (rev-0): m/s. hbl, m/s. tafe (amco), m/s. amar raja, exide.sealed maintenance free valve regulated lead acid rechargeable battery of normal voltage 12 v, nominal capacity of 7 ah suitable for use of emergency light unit of lhb type ac coaches (test certificate to be enclosed along with batteries). the battery shall not be more than 2 months old from the date of manufacture, at the time of supply. acceptable makes as per bill of material rdso/pe/spec/ac/0180-2016 (rev-0): m/s. hbl, m/s. tafe (amco), m/s. amar raja, exide.,sealed maintenance free valve regulated lead acid rechargeable battery of normal voltage 12 v, nominal capacity of 7 ah suitable for use of emergency light unit of lhb type ac coaches (test certificate to be enclosed along with batteries). the battery shall not be more than 2 months old from the date of manufacture, at the time of supply. acceptable makes as per bill of material rdso/pe/spec/ac/0180-2016 (rev-0): m/s. hbl, m/s. tafe (amco), m/s. amar raja, exide. [ warranty period: 30 months after the date of delivery]