I don't know; the cheap Hong Kong battery I just bought shows difference in status just fine. Mine says it is real Nokia and came sealed in a metallic wrapper that looked official; the hologram looks pretty good. But it just cost me a few bucks. It came from Hong Kong Dafang Logistics Limited in Hong Kong. Seems like good quality.

Edit: I didn't buy it from eBay, which I object to now that it has turned its back on non-pro sellers, so I am permanently boycotting it. I had no trouble googling a battery source that was approximately as cheap as eBay.