I wanted to change my old worn-out 44+ 6-cell battery in X230 to a smaller, thinner 44 4-cell one, as I do enjoy flat bottom, with no protruding elements. I bought one from a local computer store, but it didn't work, so I changed it for another one, but it wasn't working either. OK, fake cheap Chinese batteries I thought, returnd it to the store and ordered a third one, this time from a Lenovo dealer, more expensive, but certainly a genuine one. Yet again the same issue. It's not working. Power Manager says "The battery is not detected. Try reinstalling or recharging the battery to solve the problem".
I tried the battery in another X230, which belongs to my gf. Still same problem.
Machine: Lenovo X230 (type 2325-78G)
Battery: 44 4-cell battery, FRU: 45N1019
Screenshot attached:

Has anybody experienced similar issue before? Any hints of how to solve the issue? I must admit, I'm out of ideas.
