Well, I saw your other thread and assume you are talking about Lite DAC AH. Anyway, if the unit is properly assembled, then you should be fine. However, there are battery powered DACs if you are interested.
http://cls.audiogon.com/cgi-bin/cls.pl?dgtlconv&1187486643
Also, Scott Nixon makes a battery powered dac I think. Check out his website. And Ack dAck is battery powered as well. http://www.ack-industries.com/dAck!.html
Just thought you may consider this.