Date   : Thu, 13 Mar 2008 15:46:54 +0100
From   : anders.carlsson@... (Anders Carlsson)
Subject: Disc drive power

Ian Wolstenholme asked:

> Could a 3.5" disc drive be powered off a 9V battery?  Or a 5.25" drive?

As Jules Richardson wrote, newer 3.5" drives can be powered off 5V only. 
These drives are preferred in modern designs like people who added a floppy 
drive to their modded C64DTV and such.

I've seen that a rechargeable 9V battery holds about 170-200 mAh, compared 
to 2000-2500 mAh for an AA 1.5V battery. On the other hand I'm unsure how 
the effect would compare if you put four 1.5V batteries in series and reduce 
the voltage to 5V compared to if you use one 9V in the same way.

Regards

-- 
Anders Carlsson