Flash Memories Great Affordable 8gb Sdhc Card Is It True That Watching A Movie From A Usb Flash Drive Takes Up Less Of Your Laptop Battery...?

Is it true that watching a movie from a usb flash drive takes up less of your laptop battery...? - flash memories great affordable 8gb sdhc card

... as a movie from a DVD or hard drive?

I mean, it makes sense somewhat. The promoter of the optical drive takes a battery, so that the hard drive. I do not think that the flash memory. But I do not think that the drive may no longer be with the battery so far, just because it is not in use?

Although it is useful to keep in mind? As I am saying is that much difference?