Had you done a recal before swapping you would have seen that your BB had only 4 bars SOC. The BCM tends to lose track of the BB SOC now and then. It isn't harmful and usually resets itself every now and then.
We never pinned it down, but it seems to happen more with some BCM revisions and less with others. I'm not certain, but it may also learn the battery over time.
I assume you did not swap the BCM/MCM with the battery.
Originally Posted by Mark Elvin
Popped the Better Battery from the Blue car into the Black car today and vice versa.
When I fired up the Blue car (old battery in) after the swap it did the normal recall and went to full SOC.
However, the Black car (better battery) only went to four bars SOC after recal.
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