BMW F 800 GS 2012 Rider's Manual page 124

Only chargers suitable for
8
this mode of charging can
be used to recharge the battery
122
via the on-board socket. Unsuit-
able chargers could cause dam-
age to the motorcycle's on-board
electrics.
BMW Use chargers with the
part numbers 77 02 7 722 470
(230 V), 77 02 7 729 048
(230 V) or 77 02 7 722 471
(110 V). If you are in doubt,
disconnect the battery from the
on-board systems and connect
z
the charger directly to the
battery.
If you switch on the igni-
tion and the multifunction
display and telltale lights fail to
light up, the battery is completely
flat (battery voltage is less than 9
V). Attempting to charge a com-
pletely flat battery via the on-
board socket can cause damage
to the motorcycle's electronics.
If a battery has discharged to the
extent that it is completely flat, it
has to be disconnected from the
on-board circuits and charged
with the charger connected dir-
ectly to the battery posts.
Charge via the power socket,
with the battery connected
to the motorcycle's on-board
electrical system.
The motorcycle's on-board
electronics know when the
battery is fully charged. The
on-board socket is switched off
when this happens.
Comply with the operating in-
structions of the charger.
If you are unable to charge
the battery through the on-
board socket, you may be using
a charger that is not compatible
with your motorcycle's electron-
ics. If this happens, disconnect
the battery from the on-board
systems and connect the charger
directly to the battery.
Charging battery when
disconnected
Charge the battery using a
suitable charger.
Comply with the operating in-
structions of the charger.
Once the battery is fully
charged, disconnect the
charger's terminal clips from
the battery terminals.
The battery has to be re-
charged at regular intervals
in the course of a lengthy period
of disuse. See the instructions
for caring for your battery. Al-
ways fully recharge the battery
before restoring it to use
Removing battery
Make sure the ground is level
and firm and place the motor-
cycle on its stand.