On a different note, I notice how all the cut-and-paste media kept repeating that Space Oddity would be playing on a loop through the car radio. I don't really understand the point of the loop, since the car would have left the atmosphere by the time the song finished playing once, and sound doesn't travel in a vacuum, which would probably freeze or shatter the speaker diaphragm anyway, so Starman isn't likely to have been able to hear much. And while I'm thinking about it, what happened to the tyres? Did they explode or were they deflated before the launch?
The roadster would be using a single conventional car 12 V battery, for the radio and other essentials (not the powerpack).
Since it wasn't made for space, it likely froze.
I had the same thought about the tires. When I saw a picture, they looked like solid rubber tyres, not inflated.
The song is David Bowie's "Life on Mars?"