Need powered OTG cable

[gemniii]

I'm trying to run a USB endoscope off a Note 8.
http://www.amazon.com/gp/product/B00KJ5TE7G/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
The symptoms point to not enough power.
I used to be able to buy a cable which had three USB connections, one was male to plug into my computing device, one had a battery source on it, and the a third to plug into the equipment (camera, hard drive, etc.).

But now I'm having trouble narrowing anything down that will work. Does anyone have recommendations?

 

[twister6]

Do you mean something like these OTG cables with extra power cable?

 

[gemniii]

Do you mean something like these OTG cables with extra power cable?

Thanks but nope.
I need to provide a battery power source on one leg on the "computer" or "tablet" side of the cable.

 

[psionandy]

You could use a standard OTG cable, and then plug into a powered USB hub which would provide power to your devices...