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There is the old ABC adage. Always Be Charging. The 80% rule still applies but YMMV. Every once in a while it's probably not a bad idea to run down the battery and occasionally fully charge on an L2. It will give the BCU the opportunity rebalance the cells and recalibrate.
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Past BMW's
2020 M850i GC | 2020 X5 | 2018 M550i | 2017 X5 | 2014 535d | 2013 X5 | 2007 530i | 2002 X5 | 2000 540i/6 | 1999 M Roadster | 1989 535i | 1984 533i | 1983 533i | 1977 530i
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