Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work

The electrical charger does not work. I bought two, and neither of them worked. The car charger seems to work. The case fits. But the main charger doesn't work, and that's the reason why I bought the sets (one for my sis, and one for me). I'd return it if it was worth it, but shipping cost more than the product.