OK, it appears that from time to time, RB believes the battery to be dead when it's not. So, when power is applied in the car at startup (powered at ignition), quite often RB boot and shuts off after 5 seconds and repeats endlessly. Turning the hold switch to on allows the OF to boot, and the device operates and charges as normal. Is it common that RB cannot boot up when it "thinks" the battery to be depleted?