giradman
iPad Fan
Giradman: perhaps try a load resistor and see what current is drawn from the chargers. Probably only a few seconds would be enough to get a reasonable current reading, but note the resistors could get hot, depending on value, size and resistance.
There are also plenty of these devices on Amazon as well, also at a very reasonable price, do a search for “usb load resistors”.
Thanks for the suggestions above - I'll check Amazon shortly - Dave