VARTA CR2450 Button Cell Batteries, Pack of 10, Power on Demand, Lithium, 3V, Childproof Packaging, for Smart Home Devices, Car Keys and Other Applications: Amazon.de: Electronics & Photo
CR2450
CR-2450B | Panasonic Industry Europe GmbH
Panasonic CR2450 Lithium Coin Battery(Pack of 5) - The Battstore