One must be aware of the different terms on ebay.in. Like seller warranty, ebay warranty, returns accepted, not accepted, money refunded if not satisfied, service center warranty. Warranty of how much time provided by seller, during that time online you can claim from the seller for refund or replacement. Ebay warranty works parallel to the terms given during description by seller, so one must carefully read the description. One must also know about the term compatible and original, like one wants to buy battery for a phone, in this case compatible means duplicate or third party manufactured products and original also comes with two types of warranty like with one form seller than does not come with bill and one is with bill that you can exchange that product from any related service centre all over India. There is small difference in price between original products with seller warranty and products with bill that is valid at related service center, so I prefer to buy products with bill as there is less chances of counterfeit.