Maybe you just need luck?

I've been just over two weeks Warranty 2 such batteries in use. The do not. Within shortest time, the weak and unusable. I have already had successful purchases of similar no-name batteries. (For the E-420, a different type). They're almost as good as the original battery. Even the label on top of this one, was the same as the battery of E-420th (Is not that what is shown in the photo here, but a sticker with yellow-blue color. I thought that they also like to be good. But if they are not. Maybe it's the game that I have caught. That's why I write that you should just get lucky with such purchases might.
I am considering to return even those things. Although the 14 day period is over (if it ever for batteries which means).
With these I can get two weeks out of the box does not really work. They're trash, namely special-waste