Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointing Product But Good Customer Service

I purchased this battery and upon first use, it didn't remain charged for more than an hour, which is really unusual for a new battery. My phone would cut out constantly, which was really inconvenient. I wrote the company I purchased the battery from and received a new battery free of charge after about two weeks. I haven't tried to use the new battery, but I'm hoping it works better than the first.