CITROEN DS4 Owner's Handbook Manual page 271

Battery
Procedure for charging your battery when it is flat or for starting the engine using another battery.
The presence of this label, in particular
with the Stop & Start system, indicates
the use of a 12 V lead-acid battery with
special technology and specification;
the involvement of a CITROËN dealer
or a qualified workshop is essential
when replacing or disconnecting the
battery.
Failure to observe this recommendation
may cause premature wear of the
battery.
After refitting the battery, the Stop &
Start system will only be active after a
continuous period of immobilisation of
the vehicle, a period which depends on
the climatic conditions and the state of
charge of the battery (up to about
8 hours).
Access to the battery
The battery is located under the bonnet.
To gain access to it:
open the bonnet using the interior release
lever, then the exterior safety catch,
secure the bonnet stay,
remove the plastic cover to gain access to
the two terminals,
unclip the fusebox to remove the battery,
if necessary.
Practical information
Disconnecting the cables
Raise the locking tab fully.
Reconnecting the cables
Position the open clip 1 of the cable on the
positive terminal (+) of the battery.
Press vertically on the clip 1 to position it
correctly against the battery.
Lock the clip by lowering the tab 2 .
Do not force the tab as locking will not
be possible if the clip is not positioned
correctly; start the procedure again.
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