This AM I was operating the Maestro when all of a sudden lights and display on the Maestro started flashing randomly. All I could think of was a trip back to FRS. The culprit was the battery was going dead but the the battery indicator showed a full charge. I thought that was kind of weird since the Maestro was on battery power for about 6 hours. Plugging the unit into the supplied wall wart got it back to normal operation.