I run this clock radio to a solar system, thus completely independent of the mains supply!
Since commissioning, the device is continuously powered. The voltage may not fluctuate as it is controlled by a battery and the solar charge controller.
A step-down converter also maintains the 12 Volt is a constant 6 volts on the device.
Now explain to me why someone the device completely loses its settings when I next vacuuming.
I suppose the electronics inside is so so poorly constructed and shielded the even minimal, inductive currents to clear the memory.
But suits my television and vacuum cleaner: Philips produces consistently scrap.