I have what I would con sitter good charging cords. But once in a wile I will plug in to charge and after a few min's it will pop up and say it will not support this device. Now sometime it will go all week and be okay. Than I may plug it in at say 52% and at say 92% up comes the pop up, And if i unplug it and plug it back in it may or may not go to 100% Now this is on a iPhone 5 with IOS 7 and I think it started to do that only after I installed 7 on it 