I purchased two of these chargers because of the price. As soon as I plugged them into my iPhone, I received an error message that the phone was not charging. I contacted the seller and they said that because the charger is not OEM, the phone displays the message, but it will still charge. That's true; however, it charges so SLOWLY that you need to have it plugged in all day for it to charge adequately. If I wanted to be tethered to a wire, I would just use a land line...