Quote:
Originally Posted by Ken Maltby
"Harry T"; I assume that you were talking about the SD card using power
whenever it is accessed, not to perform its function of maintaining the
storage of data. They are able to retain their data for quite some time even
on the shelf, not connected to any power source.
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No, that's not what I was referring to. I meant that whenever an SD card is inserted into your reader, it will draw a (very) small account of power from the device, even when not actually being accessed; this is called the "standby current". It's a tiny amount, but it's not zero. A typical standby current would be about 0.2mA, compared to perhaps 80-100mA when the card is being accessed.