Audi A7 2023 Owner's Manual page 254

Checking and Filling
= Have maintenance work performed only by
trained personnel.
—Have the 48 volt lithium battery replaced
only by an authorized Audi dealer or author-
ized Audi Service Facility. Audi recommends
an authorized Audi dealer or authorized
Audi Service Facility, because these loca-
tions have trained personnel and the re-
quired parts and tools.
— Never try to replace the 48 volt lithium bat-
tery yourself. The 48 volt lithium battery in
this vehicle may only be replaced with a 48,
volt lithium battery designed by Audi specif-
ically for this vehicle. Using other 48 volt
lithium or lead batteries will result in con-
siderable malfunctions or even total failure
of the electrical system.
— Never make modifications to the lithium
battery.
— Never open the 48 volt battery.
Charging the 12 volt vehicle battery
Fig. 154 Engine compartment: connectors for a charger or
jump start cables
Observe the safety precautions > page 239, Gen-
eral information, > Z\ in Battery general infor-
mation on page 250 and > A\.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery ca-
bles remain connected.
The charging cable connections are located in the
engine compartment. The ground point @)is al-
ways located on the vehicle body.
» Switch off the ignition and all electrical equip-
ment.
» Open the hood > page 240.
252
» Press the release lever on the positive terminal
and fold the cover upward © fig. 154.
» Clamp the charger terminal clamps to the jump
start pins according to the instructions. (Hex
head bolt under a cover @), ground point on the
vehicle body ©).
» Insert the power cable for the charger into the
socket and switch the charger on.
» At the end of the charging process, switch the
charger off and pull the power cable out of the
socket.
» Remove the charger terminal clamps.
» Close the cover on the positive terminal.
» Close the hood page 240.
— Never connect a charging cable or jump
start cable directly to the 12 volt vehicle
battery. Only use the connections in the en-
gine compartment page 252.
~A highly explosive mixture of gases can form
when charging batteries. Only charge the
battery in well-ventilated areas.
~A drained battery can freeze at tempera-
tures around 32 °F (0 °C). Do not charge or
use a frozen or thawed battery. If ice forms,
the battery housing can crack and battery
electrolyte fluid can leak, which increases
the risk of an explosion and chemical burns.
Contact an authorized Audi dealer or author-
ized Audi Service Facility for more informa-
tion.
Do not connect or disconnect the charging
cable while charging because this increases
the risk of an explosion.
Read all of the manufacturer's instructions
for the charger before charging the battery.