Batteries have always been iffy on Amazon.
Ages ago, when user replaceable batteries were still common, i read a test where a dozen "original" Samsung batteries where ordered from Amazon. Including from the official Samsung Account.
Many, if not even all of them, were fake. Some obvious, even to a layman, some not so obvious.
The underlying problem of this was, that Amazon merges identical articles from different sellers. So a truly original Samsung battery lands in the same bin as all those fakes that only claim to be original and have the same barcode than the originals.
As far as i know this still happens, unless you pay Amazon to get your own separated stock