Amazon.com: ANSMANN Lithium 9V Battery for Smoke Detectors 700% More Energy 9 Volt Lithium Battery (5021023-01) : Automotive
GP Lithium 9V Block Batterien Longlife, 9 Volt Lithium Li-MnO2, 5 Stück 9v Block Lithium, ideal z.B. als Rauchmelder Batterie, für Feuermelder, Mikrofone etc.: Amazon.de: Baumarkt
Amazon.com: BOANV 4PCS 1300mAh 9V Rechargeable Batteries, 9V Rechargeable USB Lithium Long Lasting Battery, with 2 in 1 Charging Cable, for Smoke Detectors, Alarms, Keypad, Microphone : Health & Household