Instruct: Classify Amazon reviews into positive or negative sentiment
Query: So Disappointed in Kindle Battery

I have had my Kindle for a year and the battery will no longer hold a charge even when not used. The wireless is NOT on. I am trying to find a replacement battery but Amazon is not clear as to which one will work with this model. I tried "2nd Generation Kindle Replacement Battery" and nothing comes up. They didn't tell me I would have to invest $20+ per year in purchasing new batteries!! :( I wish I would have purchased an alternate product (not Kindle).