Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Battery useless just over a year after purchase

I've had this product just over a year and had decent success using it w/ my Sony Erickson T610. I didn't use it much, however, and now it's practically useless, cause the battery runs out after 20-30 minutes of use (and starts beeping before that). Since I didn't use it much, I'm guessing I recharged the battery 20-30 times at most. Since you can't replace the battery, that means it's time to buy another, but it wont be a Jabra!