Instruct: Classify Amazon reviews into positive or negative sentiment
Query: OK until it shut my phone off randomly

I purchased this battery as the original was failing. The size is a little larger in width than the original and so doesn't lay flat against the phone. The difference was pretty small, so it didn't bother me.The new battery worked for about a week and had a long battery life. However, after that it would randomly turn my phone off. Once a week at first, then about every 20 minutes.I only paid $5, including shipping, so I don't feel upset that it didn't work out. I also have a feeling a lot of the problem is my phone, which has been beat up and is old.