SD cards and battery life

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Topic: SD cards and battery life (Read 6823 times)

fang2415

Commenter

Posts: 14

May 01, 2010, 08:49:25 PM

Hey, sorry if this has been answered before, but I can't find it...

Does anybody know if an SD card affects battery usage significantly? My external HD sure did, but that had moving parts...


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#1 Re: SD cards and battery life

GregYohn

OLPC News Forum Expert

Posts: 748

May 02, 2010, 08:33:37 AM

Using any peripheral device uses energy. It does use a minimal amount of electricity, so don't sweat it being used. I disengage my SD card, but leave it in the card holder when it is not needed on my XO and ASUS desktop..

Your external HD, like a CD drive spins very fast.


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#2 Re: SD cards and battery life

fang2415

Commenter

Posts: 14

May 03, 2010, 10:56:11 AM

Yep, the HD cut the battery life from a little over 5 hours to down around 2.

I take it the SD cuts it down as well then, but not as much? Any idea how much, roughly? Does unmounting it stop power going to the device?