If it's OEM (only your supplier can tell you for sure), 18P means it was made either in August 2011 or August 2021.  Since this model system was released in 2015, it's more likely 2021, so it's about 16 months old -- again, if it is indeed OEM.
Hello. help me please. Bought a new battery. How can I find out the production date and originality of the battery? Battery photo. [IMAGE]
Date of manufacture and originality of the battery