So, after reading in the e-manual that it is a good idea to charge your Lithium battery if the car sits for a month or more, I went ahead and purchased the charger/maintainer from the dealership for $99 +tax.
Note: After not driving my M4 for 2-3 weeks, it took the charger 4hrs +/- before it reached 80% charge, and another 1-2hrs to reach 100%.
Also, two things the parts guy mentioned. These batteries cost around $2K. But that they've only replaced 2 since 2014 (that he knows of).
So, here's what you get in the charging kit:
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Currently: '19 GLA45AMG grey (his) & '21 X3M40i DGM (hers) w/ JB4@Map1
Previous cars: 2022 M4 xDrive in Mexico Blue with Silverstone/Black interior
2014 BE GTR FBO/e85
Last edited by GixY2K; 01-18-2022 at 11:08 AM..
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