PEUGEOT Boxer Handbook page 148

Battery
Access to the negative terminal
For access to the negative (-) terminal:
press button 2 then pull on connector 1 .
The batteries contain harmful
substances such as sulphuric acid and
lead. They must be discarded in accordance
with the provisions of the law and must not,
in any circumstances, be discarded with
household waste.
Take used batteries to a special collection
point.
Before disconnecting the battery, you must
wait for 2 minutes after switching off the
ignition.
Never disconnect a terminal when the
engine is running.
Never charge a battery without first
disconnecting the terminals.
Close the windows and doors before
disconnecting the battery.
After every reconnection of the battery,
switch on the ignition and wait 1 minute
before starting to allow the electronic
systems to be initialised. If slight difficulties
are experienced after this, please contact a
PEUGEOT dealer.
It is advisable to disconnect the
negative (-) terminal of the battery if the
vehicle is not to be used for a period of
more than one month.
The description of the battery charging
procedure is given as an indication only.
If the battery has been disconnected
for some time, it may be necessary to
reinitialise the following functions:
- the display parameters (date, time,
language, distance unit and temperature
unit),
- the radio stations,
- the central locking.
Some settings are cleared and must be
reprogrammed, consult a PEUGEOT.
If your vehicle is fitted with a tachograph or
an alarm, disconnection of the negative (-)
terminal of the battery (located under the
floor on the left-hand side, in the cab) is
recommended if the vehicle is not to be used
for a period of more than 5 days.