Less effective than the original battery ...

In order to replace an original battery of more than two years and really starting to sessouffler, I opted for this battery whose few existing reviews were not mostly negative.
Unfortunately, for those who criticize this negatively, it takes the road less than original battery with more than two years of use.
Even trying to optimize its use for a few days, its effectiveness has proved worse than my current battery ...
The product has been returned a few days later on ...
Was it perhaps a bad batch?
So I can not recommend this product ...