The Renata Battery R371 is a Swiss made battery with assured quality. The silver oxide batteries have a power of 1.55 V and are highly durable. As only the best quality material is used in manufacturing these batteries, it promotes the overall health of your devices. These button shaped batteries are compatible with a lot of watches, calculators, digital heart rate meters, glucometers, and similar devices. Always have them handy at home for scenarios where you suddenly run out of batteries in such devices.