Instruct: Classify the given review into positive or negative sentiment.
Query: NOT GOOD

These were good for about two weeks and then quit working. I couldnt even get it to charge my phone! Plus, my battery was in good working condition up to the point when i used this charger and now my battery wont hold a charge as long anymore as it did even since two months ago. DO NOT BUY THESE CHEAP KNOCKOFFS!