Instruct: Classify Amazon reviews into positive or negative sentiment
Query: faulty product sonic blade

Upon receiving the aforementioned, I followed the instructions and charged it for the recommended 10 hours before first use. The charge light LED turned red and everything looked ok.Subsequently I inserted the battery pack. Dead. I waited a few days and charged it again for an additional 2 hours. Still nothing. I checked the pins on the knife base and pried them slightly thinking that perhaps the contacts were bad. Still nothing. I want to exchange the product.What am I to do?