On your device there is usually a sticker next to the nameplate with a 2D bar code and the serial number (7-digit alphanumeric, i.e. numbers and capital letters).
The serial number on the sticker shown here is only an example!
Suitable products
Power Tool Kit
TE-TK 18/1 Li (CD+AP+OS)
TE-TK 18/1 Li (CD+AP+OS)