Danny D. wrote:
nospam wrote, on Mon, 30 Nov 2015 13:42:42 -0500:

charging only requires two wires, plus two to negotiate the power.

usb 3 makes *no* difference for a charger.

Thanks.

That explains why each USB socket only has four gold pins on the
white protruding tab.

I did call the company in Edison NJ at 718-499-1000, and, after going
through their operator, I spoke with "Bob", a salesman at the office.

I told him, nicely, that it must be true, otherwise it would
seem to me to be illegal to over represent the output power by 15%.

He didn't know the answer to why it says it outputs 40Watts but at
the same time it says the maximum is 6.8Amps at 5VDC, but Bob said
he'd try to find out and for me to call him back tomorrow.

It looks to me like it says "maximum power" 40 w. It doess not say that is
output power.