Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bad Design!

The batteries work well, BUT the charger can only charge in multiples of two, making you have to charge more batteries than you need to if you only need to charge an odd number. That's probably bad for the batteries. Many toys etc. now require odd numbers of batteries, and you can't charge odd numbers of batteries! Very disappointing. Also, there's only one battery charge indicator light for all four batteries, so detecting problems in one or two batteries is difficult.