Task: Sentiment Analysis
Input (English): I purchased a set of these in April 2013 for three different locations. They all seem to be defective and cannot charge the batteries after two weeks use. The first unit was good because it had instructions on how to work it. However, when the second failed within six months, not much more than one month from purchase, the next units that worked began with battery issues right away, although sometimes charging properly or not. When you go through several failures before they are replaced with another new set, this is not acceptable quality.
Output (English): Bad review