kraftmax Pack of 40 button cell batteries type 389 high-performance battery, 1.5 V watch battery for professional applications: Amazon.de: Electronics & Photo
Camelion AG13 / LR44 / A76 Knopfzelle Alkaline Alkali Batterie, 10-er Pack, Lange Haltbarkeit: Amazon.de: Elektronik & Foto
10 Stück CR2032 3V Batterien CR 2032 Knopfzelle (Lithium Knopfzellen - 3 Volt im 10-er Pack: Amazon.de: Elektronik & Foto