2x Mini Batterie 12Volt Alarm Cell 28x10mm Alkaline LR 23AE MN21 V23 A23S A23G | eBay
Varta Batterien 12V: Electronics Alkaline-Batterie, Typ MN21 / V23GA, 50 mAh, 12 Volt (Batterien A23)
Energizer A23 Battery, 12 Volt - 2 Pack Great for Electronics Like A23 12 Volt Photo / Garage Door Opener / Electronic Keychain Eveready Energizer Battery 2 Pack by Energizer: Amazon.de: Elektronik & Foto