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For compatible small devices: the CR1220 button cells are suitable for watches, calculators, remote controls, TAN generators and bicycle computers, depending on device requirements 3 V and 40 mAh capacity: the lithium manganese button cells provide the confirmed electrical values of the size CR1220 for devices with the corresponding requirements Check size before purchasing: each battery measures 12 mm in diameter and 2 mm in height, so that the required size can be matched with the existing button cell For different temperatures: the confirmed operating range from minus 20 to plus 60 degrees Celsius supports use in compatible devices under changing conditions Two button cells with storage repair: included are two CR1220 batteries, which offer a shelf life of up to five years thanks to low self-discharge