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What kind of power power can I draw from the USB 2.0 ports?

April 26, 2017draw ports power USB

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What kind of power power can I draw from the USB 2.0 ports?

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DuraTab’s M33 fully complies to the USB2.0 requirements The USB 2.0 specification provides a 5 V (volts) supply on a single wire from which connected USB devices may draw power. The specification provides for no more than 5.25 V and no less than 4.75 V (5 V±5%) between the positive and negative bus power lines. Initially, a device is only allowed to draw 100 mA. It may request more current from the upstream device in units of 100 mA up to a maximum of 500 mA.