Just wanted to pass along.
Currently, AliExpress has this
7 in 1 USB tester DC Digital voltmeter onsale for US $3.98 / piece + a Free S/H. I use this device to monitor how much current gets drawn from a USB port on my devices as well as how much current and/or Wattage gets charged to my Android smartphones.
I also used this device to find out why my DLink InDTube won't work on my S905 TV Box. The InDTube that fails on my S905 TV Box draws about 0.08 Amps while it works on my Linux desktop computer when drawing 0.18 Amps. TBH, I don't know why my S905 TV Box fails to deliver more current to the InDTube, but this
7 in 1 USB tester DC Digital voltmeter sure quickly helps me out in such a troubleshooting.