Instruct: Classify a review as either positive or negative.
Query: Fine design

This unit is quick and extraordinarily simple to use: put in the battery, plug it in. That's it. The indicator glows red for "charging" and green for "charged." There is nothing else to it. The prongs fold away so you can carry it in your camera case without worrying about them scratching anything. The only improvement I could suggest is that it have space to charge two batteries simultaneously.