(Oh, those rectangular ones that ran on D cells, where you got about half an hour of light and carrying spares only cost you about 3 kilos...
We used to have a Roberts radio, ran on a 4.5 volt battery, huge square thing with clip on terminals. When I look at a modern teeny radio running on button cells, I remember watching Dad change that battery every couple of years (he kept a note of how much each one cost, alas we got rid of it when the radio finally died), and feel old....
The radio had a dial with all the old radio stations on - Daventry and Hilversum and all those. It's the sort they've recreated in DAB form, with a leatherette coating and metal grill.
http://www.robertsradio.co.uk/Products/DAB_radios/Revival_DAB_Piano_Black/index.htm
(only now it's shiny black, not leatherette).