Other information:
If the vehicle's battery is flat, the engine can be
started using a backup battery (either external or
from another vehicle) and jump leads or using a
battery booster.
Never start the engine by
connecting a
battery charger.
Never use a 24 V or higher battery booster...
In order to maintain an adequate state of charge
for starting the engine, it is recommended that
the battery be disconnected if the vehicle is
taken out of service for a long period.
Before disconnecting the battery:
close all openings (doors, boot, windows),
switch off all electrical consumers (audio
system, wipers, lighting, etc...