Not sure about what car radios are you talking about but working on them for a while has showed me that almost all radios shipping in an automobile from the factory use a form of non volatile memory for storing you preferred stations.
Posted Sep 8, 2009 8:24 UTC (Tue) by drag (subscriber, #31333)
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All I can say is that you obviously have not been working on car stereos long enough.
boot speed matters
Posted Sep 8, 2009 20:26 UTC (Tue) by njs (subscriber, #40338)
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It's probably a function of nvram economics and manufacturer philosophy at different times -- my 15-year-old oem radio from Volvo does preserve presets over battery disconnection.
Not that this is terribly relevant to anything.
boot speed matters
Posted Sep 8, 2009 16:22 UTC (Tue) by HenrikH (guest, #31152)
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Not on any of the cars that I have ever own, including a 2001 Toyota Avensis had any form av non-volatile memory in the radio. Whenever there was service performed on the car(s) the stations went.