Electrical Start From Another Vehicle - Aston Martin DB 9 2010 Manual

What is a reasonable length of time to run the engine?
The vehicle battery normally requires a journey of approximately 30
mile (48 km) to recharge. Additionally, use the battery conditioner to
restore the vehicle battery charge.
What if I cannot restart the engine?
If the battery has been run down to a point where it will not start the
engine then an external battery charger will be required or your
1
vehicle will require a 'jump start' (Refer to 'Electrical Start From
Another Vehicle', page 11.32).
A battery conditioner is designed for conditioning of partially or fully
1.
charged batteries. It will not effectively charge a discharged battery.
11.32

Electrical Start From Another Vehicle

Warning: The donor vehicle must have a 12 volt battery and
a negative (-), black earth terminal to make sure that the correct
battery polarity is maintained.
Apart from vehicle recovery, this vehicle must not be driven
if the vehicle battery is incapable of starting the engine. In this
case the vehicle battery must be replaced.
If the voltage or earth of the donor vehicle is different or not
known, do not attempt starting in the way described.
If this vehicle will not start due to a discharged battery, it may be
started, for vehicle recovery, by connecting the battery from another
vehicle (donor) to this vehicle (recipient).
Jump Start Procedure
Remove rings, metal watch bands and any other jewelry.
Set all electrical motors and ancillaries in both vehicles to
OFF.
Set all lamps to OFF except those needed to protect vehicles
or illuminate the work area.
1. Position the vehicles so that the connecting cables will reach
into the recipient engine bay. Apply the parking brake and set
the ignition to OFF.
2. Access the jump start terminal in the recipient engine bay.
3. Connect the + ve (red) cable between the '+ve' (red) terminal
of the donor battery and the jump start terminal of the recipient
vehicle.