CITROEN DS3 Handbook page 229

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 by a
CITROËN dealer or a qualified
workshop, 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).
Practical information
Access to the battery
The battery is located under the bonnet.
To gain access to it:
F open the bonnet using the interior release
lever, then the exterior safety catch,
F secure the bonnet stay,
F lift the plastic cover on the (+) terminal.
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