Simply Choose Brand (either to match existing or because you want to upgrade) from the drop down menu above. All batteries are the same size and voltage, just the brand is different. We recommend the use of these Silver Oxide in watches which will provide a more stable operating environment. Technical Details: 1.55v Nominal 7.9mm Diameter x 3.6mm Known as: 392 SR41W SR41 TIMEX K 280-13 SB-B1 247B.
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