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
TC-TK 18/1 Li Kit
TC-TK 18/1 Li Kit
Cordless Jig Saw
TC-JS 18 Li (1x2,5 Ah)
TC-JS 18 Li (1x2,5 Ah)
Power Tool Kit
TE-TK 18/3 Li Kit (JS+CD+AG)
TE-TK 18/3 Li Kit (JS+CD+AG)