|
|
|
|
|
|
by mbell
4688 days ago
|
|
|
As a baseline it's limited to 100mA @ ~5V (150mA for 3.0). Devices can request additional power from the host, 500mA max for 1.X/2.X or 900mA max for 3.0. The host isn't required to be able to supply this much current, it can say 'no'. There are also some quasi standards and I believe now a real standard now for 'USB charging' which allows higher current (and voltage I believe). |
|
|