Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This battery is trash. Don't buy.

This piece of garbaged worked for a month, then stopped charging. Then the customer service said I couldn't return it, but I explained how much money I spend with amazon and decided to make an exception. I also got a pink battery pack off of this which didn't work. Don't waste your money. I still have battery packs that are years old that work... These must have been sitting in the incorrect atmosphere.