Renata 371 is a Swiss-made silver oxide watch battery that delivers 1.55V of power. These mercury-free batteries come in a pack of 10 and are designed specifically for watches and small electronic devices requiring reliable performance. Key features: • Swiss manufactured • 1.55V silver oxide battery • Mercury-free (0% mercury) • 10 batteries per pack • Model SR920SW • Long shelf life These button cell batteries are manufactured to strict Swiss quality standards. The SR920SW designation indicates cross-compatibility with other battery manufacturers using this standard size reference. For optimal performance and longevity, store in a cool, dry place and handle with clean, dry hands during installation.