My original solar-powered Casio Waveceptor is still going strong without servicing since 2005.
Significant time differences between pips on FM, DAB and web, Windows time from the web, and that given by my recently-synchronised Waveceptor make it difficult know which to believe.
What about gps time?
My Ceptor is pretty spot on with the TV and FM Radio, via the aerial rather than the web. Too far in the sticks for DAB. My car has a DAB option. On the 12 mile drive to the shops, I get around 4 mins of audio, the rest is no signal!