I don't know if my device is broken or what but they are terrible. All 3 only charge your phone for a few minutes before stopping. That means you don't have to charge your phone overnight because you'll have to keep checking it. At first I thought it might have something to do with my phone's charging port, but I have no problem with my friends' chargers. Don't buy them or at least get a replacement cable in case like me you get a defective set.