Energizer 321 1.55v

1 Battery sold per qty of 1. The Energizer 321 battery is a low drain 1.55 Volt silver oxide button cell battery. The 321, or SR616SW, is a popular silver oxide cell commonly used in Watches, calculators, small electronics, toys, lasers, digital assistants, keyless entry systems, digital thermometers, LED lights, electronic books, pedometers, calorie counters, stop watches, sporting goods & medical devices. Energizer goes beyond the basic battery sizes to bring you the ones you need.