Instruct: Classify Amazon reviews into positive or negative sentiment
Query: High Pitched Noise

I read reviews of this product before I bought it that mentioned that it makes a high pitched sound. I figured these reviewers probably had defective adapters. However, mine also makes a high pitched sound. It doesn't do it all the time, but I worry that as it gets older, the sound will get worse. Although it charges my computer fine, if I could do it over again, I might pay the extra money and get a different brand...unless you don't mind high pitched noises.