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Re: Does the Phaeton use a single standard 12V battery? (av_audi)

All North American Phaetons are supplied with two batteries. All European Phaetons, except the 6 cylinder version, are supplied with two batteries. A second battery is optional on the 6 cylinder car.
Michael
 

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Re: Does the Phaeton use a single standard 12V battery? (av_audi)

Here's a bit of additional information, with photos. The vehicle power supply battery (the one on the left) is the larger of the two, except on the V10 TDI, which has an equally large battery for the starter. In the past, both the W12 and V8 were fitted with an 85 Ah / 480 A vehicle power supply battery, and a 61 Ah / 330 A starter battery. A 75 Ah / 420 A vehicle power supply battery is being phased in on new production V8's.

The starter battery only provides power for starting the car (and associated relays and electronics involved in the start process), it is never used for any other purpose. If for any reason the starter battery is depleted, the driver can start the car, using the vehicle power supply battery as the source of starting power. The Phaeton on-board power supply control unit (J519 module) will do this automatically if a voltage level of less than 11 volts is detected on either battery.

The driver can also manually invoke the "emergency start" mode. This is done by turning the key fully to the clockwise (start) position, then fully anticlockwise to the accessory position, then to start again.

During cold weather operations (
 

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Re: Does the Phaeton use a single standard 12V battery? (Soki)

Hi Soki:
It's tough to try and provide a production code that will apply to other vehicles, because there could be any number of production codes out there for different battery configurations. But, to give you a point of comparison, my own Phaeton has the following production code:
J2A: Battery Specification 330A (61 Ah) and 480A (85 Ah).
If you can make a scan or a photograph of the sticker in your owner manual that lists all the production codes, and email it to me, I will post a decoding of it here on the forum.
Michael
 

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Re: (av_audi)

Quote, originally posted by av_audi »
...I was a little surprised by the amperage capabilities of the batteries...

In what respect? Surprised that they were of such large capacity? By comparison, a 39 seat de Havilland Dash 8 Series 200 aircraft, equipped with two engines of nearly 3,000 horsepower each, only uses a 40 Ah battery for starting purposes... that's much smaller that either of the batteries in the Phaeton. That same 40 Ah battery also needs to be able to sustain all navigation and communication equipment for up to half an hour following a total electrical failure in flight, which it does quite adequately. If anything, I'd say the Phaeton is overpowered, in terms of battery capacity.
Michael
 
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