My phone is now entering the 4th year of its service and I cant complain about the performance, but the battery lasting time, which is decreasing more and more.

As I had searched the net I found only substitutes from China but nothing to find at your support page.

So, in order to keep my phone in full functional mode and with fresh capacity with a new akku the question is, how could I get a correct and appropriate battery or do you offer repair elsewhere into your shops in Germany via 3rd party supplier?

If this is the wrong section moderators pls feel free to move, the navigation here is pretty mean.

Any helpful answer highly appreaciated.