Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good charger but do it with care

This is a very good charger but I found that it works best with Powerex brand battery. With other brand, sometime it can get really hot and take a longtime.For example one time I charge 8 1100 mmAh AAA batteries and after 4 hours I had to stop because the batteries got way too hot. So be carefull.