Instruct: Classify a review into positive or negative sentiment.
Query: PSP Battery

I bought this batter on the recommendations of others, when I received the battery it is all puffy and squishy in the corners right out of the package. The battery wouldn't even charge, as for sending it back it's not even worth it. If these products are not authentic, please don't say that they are and when we receive them they don't even work.