GP Lithium 9 V Block Batteries, 9 Volt Lithium Li-MnO2, 10 Year Battery Longlife Ideal as a Smoke Alarm Battery, for Fire Detectors, Microphones etc: Amazon.de: Electronics & Photo
AmazonBasics Everyday Alkalibatterien 9V | Batterie Test 2022
ANSMANN 9V Extreme Lithium Batterie speziell für Rauchmelder 9V E-Block ER9V CR-V9 1100mAh High Energy: Amazon.de: Elektronik & Foto