It has first 18 months replacement and next 18 months pro-rata means after 18 months you will not replacement but you can buy new battery at discount on returning the existing battery iff it failed to give back up. I suggest go for 48 months warranty. Amaron batteries cost less than exide for 48 months warranty battery. Again here 48 means 24 replacement+ 24 pro-rata warranty. Or it may be 36+12 month is case of amaron 36 month replacement warranty. Check specifications properly it doesn’t apply to all models. Better visit local dealer and warranty details for different models or you can do online also but all model details not available online. I suggest amaron, 2nd choice exide. Both are good battery. Don’t go for local brands