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Using a battery charger on G20 M340i xDrive
The M340 has 2 batteries. One is in the trunk and is a big AGM and the other is under the hood. The one under the hood is a Lithium Ion batters. The 2 appear to be connected to the same bus.
Since I frequently travel, I hook the car up to a battery charger. What mode do I select?? AGM or Lithium?? What are the differences?
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