Which battery for D530

I am using a D530 for already 3 years, and it is time now to replace the battery. Unfortunately, I cannot find which battery model I should purchase. Search on various Dell sites provides no information about the battery model I need.

Since for other Latitude models from the same generation there are replacement batteries available, I really hope some of the models sold would fit and work properly on my D530. Any idea which Latitude models use the same battery as my D530?

Thanks in advance,

Peter