Quote:
Originally Posted by calvin-c
That's up to the device. The card doesn't require any power when it's not being used-but some devices might send power to it anyway. Others don't. Like I said, it's up to the device.
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The standby current is required for the device to be able to check the status of the card (eg to see whether or not a card is actually present in the slot), so I would imagine that most devices would power the card whenever the reader was "awake". But that's just guesswork on my part. Perhaps, as you say, there are some that don't.