Stay away at seller Online2013

In April 2014 I ordered the battery in Online2013. The delivery took place without any problems within 2 days. The battery was without original packaging, which is safely but according to enclosed letter from the seller. However, one might have found in the original packaging, that the image printed on the battery date (2012 in my battery) is the date of manufacture. This I have unfortunately not respected and have used the battery pack. He then held exactly nine months! Finally, the charge reached only for half a day, even though I'm not Dauernutzerin. For the first time I was allowed to experience that a battery swelling (about 1 cm) and "blow off" the rear shell of the phone can. My complaint was rejected by referring to the elapsed warranty period.
Now I have a new and original packed battery purchased (Herstell.datum end of 2014) at an electronics store. This holds a charge much longer.
Conclusion: Anyone who buys a layered battery, should change it immediately and insist on new goods !!