SR721SW coin cell

The straightforward answer is that this battery uses silver oxide technology and provides a stable 1.55V output to compatible devices. It’s commonly used in fine wristwatches, blood sugar monitoring devices, some hearing aids, and small electronic devices and standard calculators. The diameter is about 7.9 mm, thickness is around 2.6 mm, and weight is about 1.4 grams. Choose a Renata Swiss battery for stable performance and long-term reliability, and avoid batteries with a higher risk of leakage or performance drop across different temperatures.

The difference is the number of batteries and the packaging format. Renata 362 batteries in the SR721SW series are available in single-piece packs or boxes with 5 pieces or 10 pieces, depending on your maintenance or work needs. All have the same voltage and structure, emphasizing stable performance and fewer leaks. Choose the pack size based on your replacement rate so you spend less time searching and always have spares for important devices like watches or measuring equipment.

Store batteries in their original packaging or in airtight containers and keep them out of reach of children. Keep them in a cool, dry place away from moisture and high heat, and avoid exposure to chemicals or flammable substances. When not in use, keep the ends securely covered and avoid any contact with metal materials that could cause a short circuit. Follow general battery safety instructions for storage to help maximize battery life and keep your devices safe.

Yes, they work with many small, precise devices including wristwatches, blood sugar meters, some hearing devices, and small electronics like calculators. Their stable performance and reduced leakage make them a reliable choice for devices that need consistent voltage and dependable operation across different temperatures. Choosing Renata batteries from this series supports steady performance in sensitive devices and reduces the need for frequent battery replacements.

If you regularly use precision watches or measuring devices, storing 5 to 10 batteries in appropriate packs should cover your needs without interruption. Having multiple batteries allows quick, flexible replacement when performance starts to drop, helping maintain continuous operation of essential devices. Renata batteries in this range maintain high quality and consistent performance over time, making it a practical option for both professionals and DIY repair enthusiasts.