Hands off! Who buys cheap, buys twice ...

After had given up the ghost after about 2.5 years of my original battery FritzFons, I was looking for an alternative. The Amazon search led me to this article.
For about 3.50 euros, I thought to myself, you can try out the partial times.
Was supplied by the provider Marktplace- very quickly and without additional shipping costs. Get I had the battery with the imprint "OTB" (manufacturer?).
Other reviews complained about the larger width, so that the battery does not fit into the appropriate tray. The battery delivered me is a little wider still fits but in the tray. The lid goes to a little more difficult, but not so that you would think it from bursting.

But now to the poor product quality:
The part was delivered already defective.
The defect was that the black cable already torn out of the connector or was not pressed in properly. In the worst case, the two poles would touch and thus the entire battery can burn (depending on state of charge).
For the amount paid to me was too big of complaint costs. Therefore I made from the old original and the supplied faulty battery, by soldering a working together.

I want to end, therefore, recommend to buy a better quality!