Is there a way to find out how much current or power a USB-OTG device can draw while connected to my phone? I'd be happy with something like:-
- an online database like GSMArena with details for lots of phones
- an app I can run on the phone to find it out e.g. from the USB host driver in the kernel
- a file in
/devI can read (as root, if necessary)
I'd rather not have to test it with hardware by connecting a USB peripheral to it and increasing its current draw until it stops working.
The particular phone I'm interested in is a Nexus 5, but I'm really looking for an answer that's applicable to any phone (that supports USB-on-the-go).