Worked very well for the first few weeks, then one after the other stopped working. Well if you look closely it looks like tiny bits of metal somehow ended up in each charger and shorted them out and now none of them work. My guess is that the tiny fragments stuck to the connector magnet and then moved to the cord magnet. I didn't like that the magnets aren't strong enough to stay connected to the port while using the phone. Also, they don't charge quickly. Everyone is just disappointed.