Explosion hazard:
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 330Ci, 2005 BMW 330xi, 2005 BMW 330i, 2005 BMW 330Ci, and 2004 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Strictly no flames, sparks, naked light or smoking!
A highly explosive mixture of electrolytic gas is created when batteries are charged. The rooms where charging is carried out must therefore always be well ventilated.
Avoid the formation of sparks when handling cables, wiring and electrical devices.
Turn the ignition lock to the 0 position before disconnecting or connecting the battery.
Do not place tools or any similar object on the battery (danger of short-circuiting and explosion!).