The original battery was a lithium-polymer battery (exactly the same reference), the here supplied me sent battery is a Li-Ion. The capacity of the new battery is equal to that of the 3 year old batteries. Mobile holds a maximum of 2 days and not as the beginning of more than one a week.
It may be that this is also an original Nokia battery, so I do not send it back, but I would expect that these differences will be pointed out clearly in the product description.
Next time I'm smarter .... the not again!