The Toyota dealership I
The Toyota dealership I talked to told me their service guys have never seen a production date on the "new" "official Toyota" batteries. So, the price drop may be due to these new batteries simply being unused, and just as old as the battery you are replacing. Having said that, I still intend to go that route and test the "new" battery with the Dr Prius app, returning it if it is not in good shape.