CITROEN C-ZERO Handbook page 91

F Connect one end of the red cable to the
(+) terminal of the flat battery A, then the
other end to the (+) terminal of the back-up
battery B.
F Connect one end of the green or black
cable to the (-) terminal of the back-up
battery B.
F Connect the other end of the green or black
cable to the earth point C of your broken
down vehicle.
F Start the engine of the vehicle with the good
battery and wait for a few minutes.
F Operate the ignition switch of your vehicle
until the "Ready" lamp comes on.
F Disconnect the jump cables in reverse
order.
F Refit the protective cover on the battery and
tighten the retaining nut.
If the "Ready" warning lamp does not come on,
proceed as follows:
F Leave the cables connected.
F Set the ignition switch of your vehicle to the
"LOCK" position.
F Charge the main battery, following the
normal charging procedure.
F When the charging indicator lamp comes on
constantly (fixed) in the instrument panel,
disconnect the cables.
F Allow the charging to continue for at least
one hour.
F Operate the ignition switch of your vehicle
until the "Ready" lamp comes on.
If the problem persists, contact a CITROËN
dealer or a qualified workshop.
https://www.automotive-manuals.net/
In the event of a breakdown
Charging the battery using
a battery charger
F Remove the battery protective cover.
Make sure the electrolyte is not frozen.
Check the level and top up with distilled
water, if necessary.
For more information on Checking levels,
refer to the corresponding section.
F Unscrew nut 1 and remove the retaining
clip.
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