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
Cordless Lawn Trimmer
GC-CT 18/24 Li (1x2,0Ah)
GC-CT 18/24 Li (1x2,0Ah)
Garden Tool Kit
FREELEXO 1000 BT Kit
FREELEXO 1000 BT Kit
Garden Tool Kit
GE-CM 18/33 Li Set
GE-CM 18/33 Li Set