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Having read this discussion, I went out and slapped a sophisticated battery charger on my one month old 2014 X1. It assessed the level of charge as 75%. It took about an hour at a fast charge rate to bring the battery back to 100% charged.
Lead acid batteries do not like to sit at less than 100 charge. Not at all. It significantly shortens the battery like.
Planet BMW is certainly a strange place!
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