61 21 028 Charging battery (4' Series coupe, convertible, and GranCoupe sedan)
IMPORTANT:
Lead-acid battery, AGM battery:
To prevent the intelligent battery sensor from malfunctioning, use the charging points in the engine compartment.
To prevent the intelligent battery sensor from malfunctioning, use the charging points in the engine compartment.
OBSERVE INSTRUCTIONS ON INTELLIGENT BATTERY SENSOR/BATTERY ELECTRONICS .
NOTE:
Use BMW-recommended charging computers* to charge the battery.
*sourcing reference BMW APPLICABLE WORKSHOP EQUIPMENT CATALOGUE .
*sourcing reference BMW APPLICABLE WORKSHOP EQUIPMENT CATALOGUE .
Pay attention when charging the lithiumion battery!
Existing chargers that are designed for the lead-acid or AGM battery generate a Charging voltage that is too high for the lithium-ion battery.
If the charging voltage is too high, the electronic disconnect switch of the li-ion battery can open, which generates a ccm message in the instrument cluster.
Before charging a lithiumion battery, ADJUST THE CHARGING VOLTAGE of existing charger adapters once.
Follow NOTES ON LITHIUMION BATTERY .