Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Works for awhile.. then dies.

This unit works fine when it's new. But we didn't even have it a year before the battery wouldn't hold a charge anymore. We could only get a minute or so before the battery would die! Very frustrating. Then when I went to try to replace the battery I found out that you can't! You are supposed to throw it away and buy a new one! That sucks.The next one I buy, I am going to be sure I can replace the batteries when they die.