Wallace & Gromit Radio Mystery

Talking Radio Alarm Clock details...
The first clock was a treat, but twelve months later Wesco topped it with the larger Radio Alarm Clock. This was a weighty item, measuring 210 x 190 x 180mm, and this time our plasticene duo were depicted in their West Wallaby St. living room. The LED clock was framed like a picture, to the left of the fireplace above Gromit. When the alarm sounded the hearth 'glowed'. You could hit Wallace's slippers for the SNOOZE , OFF and DEMO controls. Gromit's bowl served as a VOLUME control, and the spotted pouffe served as the radio TUNER. When the alarm sounded we heard Peter Sallis again:

I have owned this radio for years. The mystery is that I cannot remember the last time I changed the batteries. I am talking years (2-4?) and I use the radio virtually every day. Has Nick Park designed the perfect electical source?

Denis