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Long Power: The CR1220 button cell features metal construction, providing consistent 3V output with 45mAh capacity for extended use in watches, remotes, and calculators without frequent replacements. Wide Compatibility: Standard 12mm diameter and 2.0mm thickness design ensures perfect with various small electronics including car keys, health , and digital timers with smooth energy . Safe & green: Made with materials that minimize harm to nature while ensuring user during use, meeting modern consumers expectations for loyal power sources. Stable Energy Supply: Designed to deliver constant 3V power without variations, essential for sensitive equipment like health tracking devices and precise timekeeping products. Easy Installation: Toolless setups allows quick battery changes in seconds, offering convenient maintenance for users handling multiple electronic items daily.