Do you mean input voltage? Have you looked at the SRM?

http://www.elinux.org/Beagleboard:BeagleBoneBlack#LATEST_PRODUCTION_FILES_.28B.29

Maximum is 5.2V. 5.7V is not safe as it will blow up the 5V switch that
controls the USB host voltage.

Gerald



On Fri, Mar 28, 2014 at 7:06 AM, Andrew Dai <[email protected]> wrote:

> Hi all,
>
> What is the maximum recommended voltage for the BBB? I've seen the minimum
> is 4.1v but I haven't seen any mention of a maximum.
> I have a 6 volt (4xAA batteries) battery pack and I want to wire that to a
> barrel jack connector to power the BBB. I think right now the voltage is
> ~5.7v. Is this safe?
>
> Thanks,
> Andrew
>
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