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Making a external enclosure battery operated?

Red Squirrel

Red Squirrel

No Lifer
I'm thinking of building myself an adapter of some sort that will either be built on the enclosure or part of the plug in adapter with a 2 way switch type thing.

I need a 5v line and 12v line, so for 5 volt the closest would be 4 AA batteries and for 12 I'd have another 8 AA batteries. So 12 batteries total. (rechargable ones obviously as I don't think they'd last that long)

Could this be a problem, considering the 5V will be 6V? Also when the batteries are getting low, would it cause the motor to be forcing more or would it simply not power on at all?
 
Voltage Regulators are your friend in this case.
For a job like this, you could probably just chance it with roughly the right number of batteries; but a setup with a 5 and a 12 volt linear regulator would be rather safer. If you are feeling really fancy, a DC-DC converter would be the ideal thing.
 
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