Product has in no way met the promised properties

I have used as a battery a few years ago in my camera (Minolta Dynax 500si). She has more than 2 years has done its job. This had a very short time to malfunction until nothing was displayed on the camera. When I opened the battery cover, came to meet unpleasant odor. The battery indicated in a measurement takes only 6 V 3.01 V. The after less than 2 months (it was half full movie)! Also, if the battery did not cost much, scrap should not be sold yet. onlineversand-leipzig.de (Sandra Schirke) after several mails not willing to send me a new one. A clear case of warranty! After consultation with Amazon Online store-L was. called to comply with the warranty obligation. I received no reply. Amazon was accommodating, I received a voucher.