Note that a "real" IMPRES battery should have
IMPRES, in cap bold italics on the label (note spelling). There are various levels of imitation going on out there, including a battery company named Impress, and people selling batteries with "impress" or even "IMPRES" in the title and/or description, like
this and
this. I've no experience in whether they actually bother to clone the circuitry that's present in the real deal, but I doubt it, and wouldn't want to find out the hard way.
I don't know if it's legit, but older stuff might have an "impres" stylized logo in lower-case with "Intelligent Battery", like
the box of this one, but I see the upper-case logo on the battery in the window of the box (though the out-of-box pic is of a different battery than the boxed one).