Renata 377 blue

To choose correctly, first check compatibility with your device and the required voltage, then adjust the quantity based on how often you’ll replace it. In this range, you can choose packs of 5 or 10 pieces, or a single unit, depending on how frequently you need to change the battery. This is a silver oxide button cell battery that provides a stable 1.55 V and weighs about 1.4 g. Its diameter is 9.5 mm and thickness is 2.6 mm. It’s suitable for watches and certain small devices such as glucose meters.

Silver oxide battery chemistry is the key technical feature. It ensures a stable 1.55 V output, a long service life, and reduced leakage risk, helping protect sensitive devices. The precise dimensions—9.5 mm diameter and 2.6 mm thickness—ensure a perfect fit in battery compartments designed for these button cells. Together, the chemistry and size directly affect performance and reliability in watches and wearable devices.

They’re ideal if you manage multiple small devices and prefer packs of 5 or 10 to avoid running out, as well as if you prefer buying a single battery for occasional replacements. Options in strips and descriptive PDFs make it easier to choose based on your replacement schedule and the per-battery cost. Common uses include watches and some tiny medical or electronic accessories that require reliable power.

Store the batteries in a cool, dry place, away from heat and humidity. Check expiry dates when provided, and avoid mixing used batteries with new ones. When needed, replace all batteries in the same device at the same time to prevent uneven wear and reduced performance. Follow the packaging instructions and recycle the batteries according to local rules.

Renata is a Swiss company known for high-quality batteries and dependable technology. This silver oxide button cell delivers stable performance, excellent durability, and improved resistance to leaks—making it a popular choice for watches and other small, sensitive devices. This reputation is reflected in the products offered, which focus on safety and energy efficiency to help extend device life.

Choose based on your replacement frequency and budget. If you use several watches or small devices often, packs of 5 or 10 lower the cost per battery and help you avoid shortages. For occasional use—or to test compatibility before buying in a bundle—one battery may be enough. In all cases, make sure you choose the correct voltage and chemistry for your device to ensure reliable performance.