OK,
One of the chargers is USB-C in and USB-C out ONLY.
One is Micro-USB in and Micro-USB out only.
One is Lightning in and out only.
Its a neat product because for the price you get a charging cable that can charge all three at the same time, or be used as a jack of all trades for your car,work,ect for a very cheaper price than a gas station countertop model.
The batteries themselves seem kinda wonky, like a cheap mp3 player they will just trickle charge "forever" it seems, with no end. I'm afraid to use them on anything I care about but the micro usb did start to charge my blue tooth headset but I have no real data.