Curious what folks are using for power.  I picked up an iDefender and an iPower 5v. Unfortunately, the combo didn't work for me.  I mean, they both worked fine separately, but the Sabaj wouldn't power on with the iPower connected.  I tested the output voltage and it was right at 5.2v....so maybe the Sabaj didn't like the voltage that high.
Anyway, I returned the iPower and am looking for another solution (that's closer to right at 5v).
-Jim