1) This is NOT an original Nokia device. It's the fake Nokia accumulator of some unknown origin. (What did u expect for seeking price ?;)) It came to me without any documentation, warranty, etc., simply in a small plastic bag. Though it has a hologram label Nokia, just by a simple visual comparison with my previous original accu I could see a much Poorer Quality of assemly and plastic.
2) Do not know if my case is a kind of unique, but the height (length) of this accumulator is about 1mm more than the original. That made it a bit hard to put it in it's place, but finally it was ok.
3) This is likely the cheapest offer u can expect for this type of battery. In my opinion, though it's a fake, it's better to have this one than to buy not to original one in a shop for for ~ 10-12Eur.
4) Works well
Summarizing, I can say That I did not regret at all. This is a very nice price for such device and so far I did not experience any problem with it.