My 2010 Pathfinder did the same thing right after it was purchased. I put it on a slow charger and brought it back up to full and have not had the issue since.
My 370Z regularly sits for a week at a time without being started and I have not seen this happen.
Keep an eye on it, my H2 came from the dealership with a dead cell in the battery and left me stranded less than 1 month after purchase.
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