As a silver oxide coin cell, the Maxell 390 SR1130SW has the ability to keep devices running for years at a time. With a low self-discharge and stable output voltage, the Maxell 390 is ideal for high current demand devices like keyless remote entry systems for homes and cars, calculators, heart-rate monitors, glucometers, and watches. With a shelf-life of 5 years, the Maxell 390 is the perfect item to buy in bulk as it will be ready to use at a moments notice for whatever devices are in dire need of a replacement battery.