Aston Martin DB11 Owner's Handbook Manual page 258

5. Connect the positive cable (4) between the positive terminal
of the donor battery and the positive (+) jump point (2) on
the main power feed.
6. Connect the negative cable (5) between the negative
terminal of the donor battery and the suspension earth (-)
nut (3).
12.56
Maintenance and Technical Data
7. Start the donor vehicle engine and increase the engine
speed and run at about 1500 – 2000 rpm for two minutes
The donor vehicle must be set to OFF. If the donor vehicle is
not set to OFF the recipient vehicle will not start.
8. Set the donor vehicle to OFF.
9. Start the engine of the recipient vehicle.
10. Leave the jump start cables attached and the engines
running for 2 to 3 minutes to allow the battery to charge.
11. Remove the jump start cables, first the negative cable from
both vehicles and then the positive cable from both
vehicles.
Allow the recipient engine to run until the discharged
battery is sufficiently charged (15 to 20 minutes) to start the
engine without assistance. Set the engine to OFF and restart
the engine. Take the vehicle on a long run to fully charge
the battery.
Contact your Aston Martin Dealer to have the battery
checked or replaced.
Charge time can depend on the battery state of the donor vehicle.
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