A:Answer One output has a very faint mark and that is the higher powered output, the side of it with the least markings on the side. The other output has no marking by the output and is the lower powered output, if you look at the long side going toward the part you plug in on side of the output that side has a lot information printed in white. I hope I've cleared any of your question up.
The slow charging seems to last longer to me by the way, and that's what I use.
I've included a picture and the white cable I have plugged into the lower powered output with the writing on the same side as that output.
