Yep, the iFly scrambles to conserve power to help eliminate the reboot. So, true it would most likely terminate a USB or Serial connection. Sorry about that, guess I missed that on the first email. Something that might help reduce that is to connect the DC adapter to the optional External Battery, and then run to the iFly. Then if the power cord at the DC adapter was unplugged, you'd be fine. However, if the power plug at the unit was unplugged, you'd likely experience the reboot scenario.