Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor functioning

Battery is not charging automatically. Have been using the product for only 6 months. Did a self-test and the battery was at critical - apparently not charging until manually performing this check. Thought this was odd, so I wrote to customer support and they sent me the newest software. I installed, waited a month, and again, the battery was at critical until I manually performed a self-test and then it started charging. I'm disappointed in the functioning of the product.