Instruct: Classify Amazon reviews into positive or negative sentiment
Query: You get what you pay for

I thought a battery was a battery. This battery is a piece of junk! I put it in my watch and the time and date keep changing. Never had a problem with the watch doing that in the five years I've owned it until I put this Chinese knock-off in the back of it. Now I'll go spend the extra bit of money and buy a quality name brand battery!