I heard somewhere that the next gen of CarPlay will support Bluetooth (don't know any more info; I don't have an iPhone)
If CarPlay is active, the phone will be awake - CPU ramped up using power; data and GPS radios active and working; BT radio working overtime - the phone battery would drain so quickly it wouldn't be worth it.
We live in an underpowered world; battery-wise!
I know I, for one, would rather have the thing plugged in so at least it would get some power from the USB port!
EDIT: WiFi would probably be better than bluetooth, due to data transfer rates, power consumption and overhead...
2012 Octavia vRS TDI. Darkside big turbo, 3bar tune, other stuff. 200kW/650Nm.
1990 Mk1 Cabrio. 1.9 IDI w/ 18PSI.
1985 Mazda T3500 adventuremobile. 1973 Superbug. 1972 Volvo 144 in poo-brown.
Not including hers...
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