Trickle charging
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 328xi, 2010 BMW 328i, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
The increased standby current consumption can be compensated for via the jump-start connection point with the aid of the "Acctiva easy" battery trickle charger.
IMPORTANT:
The cigarette lighter is isolated from the electrical system after terminal R "OFF" on a timed basis (60 mins.), thereby interrupting charging of the system battery via the cigarette lighter. This is prevented if the battery switch (on the right side of the luggage compartment behind the panel) is turned on and off again twice within 2 seconds. (Cigarette lighter battery charging function).