The 6-pin connector is commonly found on desktop computers, and can supply the connected device with power. The 6-pin powered connector adds power output to support external devices. Typically a device can pull about 7 to 8 watts from the port; however, the voltage varies significantly from different devices.[10] Voltage is specified as unregulated and should nominally be about 25 Volts (range 24 to 30).
Apple's implementation on laptops is typically related to battery power and can be as low as 9V and more likely about 12V.