It’s a Huawei HB5N1H replacement battery.
We have the one from AkkuKing from this listing:
But the one from vhbw is working equally fine according to other users in the thread. And towards the end of the thread, there is a new supplier “jubatec”. Battery seems fine, even if the spacer fails. 
The availability infos from this thread of course are no longer valid.
You might check the links in the thread, wher you surely find all info you are looking for.
For any further questions don*t hesitate to ask.
@Stefan Thought so myself.
That’s why I linked at least relevant postings.
Maybe time for a wiki?