Durared" comes in 3 models - 12 volt tall tubular 100 AH, 12 volt tall tubular 150 AH, 12 volt 200. AH These batteries are manufactured using the purest form of lead and lead sub-oxide and they weigh 7 to 10 kg more than normal batteries. This is bcoz they contain a larger qty of lead and lead sub-oxide which enhances the life of the battery and also the back up time. These bat-teries are manufactured as per international specs and with the purest quality of raw material which gives them the edge over other batteries. Service is our priority and aim. Hence, we undertake the service of these batteries irrelevant to whichever inverter they are connected to.