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      03-22-2020, 09:32 PM   #8
Billfitz
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Drives: '15 328iX GT
Join Date: Jan 2015
Location: New Hampshire

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It's not coded, it's registered. It's done because the car increases the level of charge as the battery ages, to compensate for the reduced capacity. If you don't register a new battery the car won't know that it's new and will continue to charge it as if it was old, reducing battery life.