Das stimmt (sind sogar 300 Wh), findet man übrigens hier:

https://www.law.cornell.edu/cfr/text/49/173.185

unter (c) Exceptions for smaller cells or batteries (1) (iv): For transportation by highway or rail only, the lithium content of the cell and battery may be increased to 5 g for a lithium metal cell or 25 g for a lithium metal battery and 60 Wh for a lithium ion cell or 300 Wh for a lithium ion battery, provided the outer package is marked: “LITHIUM BATTERIES - FORBIDDEN FOR TRANSPORT ABOARD AIRCRAFT AND VESSEL.”

Danke dir!

Zum Glück gelten im See- und Luftverkehr "unsere Grenzwerte" in der Verpackungsanweisung 173.185!