PEUGEOT 4008 Online Manual page 215

Never start the engine by connecting a
battery charger.
Never use a battery booster of 24 V or
higher.
Check first that the slave battery has a
nominal voltage of 12 V and a capacity
at least equal to that of the discharged
battery.
the two vehicles must not touch.
Switch off all power-consuming
equipment on the two vehicles (audio
system, wipers, lamps, etc.).
ensure that the slave cables do not
pass near the moving parts of the
engine (fan, belt, etc.).
Do not disconnect the (+) terminal while
the engine is running.
If you intend to charge your vehicle's
battery yourself, use only a charger
compatible with lead batteries, with a
nominal voltage of 12 V.
Follow the instructions for use provided
by the manufacturer of the charger.
Never invert the polarities.
In the event of a breakdown
Charging the battery using
a battery charger
F Disconnect the battery from the vehicle, if
necessary.
F Follow the instructions for use provided by
the manufacturer of the charger.
F Reconnect, starting with the (-) terminal.
F Check that the terminals and connectors
are clean. If they are covered with sulphate
(whitish or greenish deposit), remove them
and clean them.
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