Maximum output amperage from USB Smartphones

android iphone usb smartphone android-hardware
Apoleo picture Apoleo · Jan 6, 2016 · Viewed 13.1k times · Source

The Output voltage from an USB port is 5v, and it can't be changed, isn't it?!

But what is the maximum amperage that I can drain from a smartphone? It depends on the battery, hardware or is limited by the OS? There is difference between Android/iPhone/otherOS phones? Can I control the output amperage with an App? And if the phone is rooted?

Important example what is the maximum amount of current that can provide Iphone 6 from USB?

Answer

Srikanth K. picture Srikanth K. · Jan 14, 2016

The official maximum on current provided on USB 2 OTG port is 500mA and minimum is 8mA when the port is in Host mode.

Source http://www.usb.org/developers/onthego/otg1_0.pdf #2.5

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