Hello, how are you? I am wondering about this. In the house, I now have the 8 plus. And my wife as a 7 and an old 5s. From what I can tell, the Powerbricks are pretty similar, as the three of them have output of 5v and 1amp. So I am wondering if we can interchange the chargers between the phones as it would be easier to have one on hand for all devices instead of searching for the specific one. Any harm or long term damage to the batteries by doing so? Is using the old 5s charger and cable on the 8 plus harmful? Thank you. Cheers!