Quote:
Originally Posted by Mad Dragon
BMW's AGM batteries are black.
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Conforming to BMW’s Efficient Dynamics, these vehicles will include the following:
• Brake Energy Regeneration - The system increases the demand on the charging system under braking thus charging the battery when the vehicle is reducing speed which results in saving fuel.
BER requires an intelligent battery sensor (IBS) on the negative terminal of the car battery and a communication interface on the alternator. In addition, vehicles with IGR use only AGM gel batteries that can withstand the large number of charge cycles. When servicing it is important to ensure that only that type of battery is fitted.