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Charge iPhone While Mac is Sleeping
Authored by: wallybear on Oct 03, '07 03:47:32AM

Firewire ports can supply voltages from 8V up to 30V, it's in their specifications. This is not a problem, as the device that uses the port has a voltagfe regulator on board. The iPod Dock Connector will send the correct voltage to the USB ports.

Recent Macs (at least form PMac G5 and later) supply power to FireWire ports also when turned off (not only when sleeping). It alarmed me when I saw for the first time the firewire external drive still on when Mac was off, but I discovered it is a new (odd) feature.

Many self powered USB hubs supply power also when host computer is off; not all of them, but most.

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