Exide Industries — replacement policy of exide battery

Address:

700051

My exide battery serial number is a1l3c319871. This is exide max. I bought it from "the lokenath battery centre", 122/1, m. B. Road, nimta, kolkata : 49. (Dealer code: 12398) my battery gone dead. I want to buy a new one by replacing this. What is your replacing policy? Unfortunately i lost my invoice and the dealer doesn't help regarding this. He is offering me rs.1000.00 discount by replacing my battery. Then why shouldn't i go for amaron or other battery with a good replacement policy?