Jump-Lead Starting - Porsche 911 Manual

Jump-lead Starting

Depending on the model and equipment, the vehicle
is equipped with a lead-acid battery with AGM (Ab-
sorbent Glass Mat) technology or a 12-volt lithium
battery (LiFePO4).
In vehicles with a lithium battery, the battery is la-
belled with a sticker.
e Under no circumstances remove, deface or ren-
der illegible the sticker.
Lead battery jump-lead starting
b b Vehicle with lead battery.
If the battery is flat, another vehicle's battery can be
used for starting and as an external power supply
with the help of jump leads. Both batteries must
have a nominal voltage of 12 V. The capacity (Ah) of
the donor battery must not be substantially less than
that of the flat battery. The flat battery must be
properly connected to the vehicle electrical system.
> Please refer to chapter "Battery" on page 52.
Repeated jump-lead starting under normal operating
conditions may indicate that the battery is damaged.
Unsuitable jump leads
WARNING
and incorrect procedures
A short circuit may be caused if unsuitable jump
leads are used or if jump-lead starting is not per-
formed properly. Short circuits can cause fires.
e Use only standard jump leads with sufficient
cross section and completely insulated terminal
clamps. Follow the instructions provided by the
jump lead manufacturer.
e The vehicles must not touch, otherwise current
may flow as soon as the positive terminals are
connected.
e Ensure that conductive jewellery (e.g. rings,
chains, watch straps) does not come into contact
with live parts of the vehicle.
e Never connect jump leads directly to the battery
or other electrical components. Only connect
jump leads to the jump-lead starting terminals.
Jump-lead starting using
WARNING
a frozen or damaged
battery
When performing jump-lead starting using a frozen
or damaged battery, there is a risk of explosion and
chemical burns.
e Do not perform jump-lead starting using a frozen
or damaged battery.
Corrosive electrolyte
CAUTION
Lead batteries contain highly caustic battery acid
that can cause damage to the skin and clothing in
the event of contact.
e Wear safety gloves and eye protection.
e If the eyes or skin come into contact with battery
acid: rinse the affected area with cold water for
several minutes.
Jump-lead Starting
Performing jump-lead starting
Fig. 96: Lead battery terminals
1. Open the luggage compartment.
> Please refer to chapter "Performing emer-
gency release of luggage compartment lid"
on page 150.
2. Remove cover in luggage compartment.
> Please refer to chapter "Luggage compart-
ment" on page 146.
3. Connect the red positive cable to the positive
terminal for jump-lead starting +.
4. Connect the red positive cable to the positive
terminal of the donor battery.
5. Connect the black negative cable to the negative
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