Question about Ledlenser P7R

Good day, I bought this flashlight today. I am very satisfied. I have been buying Ledlenser flashlights repeatedly for years. Now I would like to have an additional battery for this one. It is very difficult to find out which one is the right/suitable one. And now, unfortunately, I have made a mistake... Although: The packaging of the battery says that it should be suitable for this flashlight...? However, the battery is thinner, shorter, and does not have the same performance values as the original battery... Could you please help me...? There are various flashlights like the P7r, P7R, P7R pro, P7 Core..........?? I will return the battery to the Basel branch tomorrow. However, I would still like to have an additional battery as a spare/supplement...