Dependable and Long-lasting Premium 3 Volt Lithium Coin Cell Batteries Aunema CR2032 3 Volt lithium coin batteries are a premium brand of batteries. More reliable than competing brands coin cell batteries. Aunema's CR2032 batteries work for keyless entry, toys, games, watches, LED lights, heart rate monitors, glucose monitors, calculators, pet collars and bathroom scales. The batteries provide dependable stability for electronics while being lightweight and still having high energy output of 3 volts, twice that of conventional batteries. Voltage does not waver even during long periods of use, improving reliability of your devices, especially with heart rate and glucose monitors . Dependable over a wide temperature range of -30 to +70 degrees C. Premium construction of lithium coin battery, ensures maximum leakage resistance over a long span of time. Batteries utilize sealed innovative technology to reduce battery self-discharge. Don't settle for just any cheap coin button battery. Nothing worse than having a device fail on you because you weren't willing to spend a little for a premium battery. Guaranteed to be dependable, or your money back. If Aunema CR2032 3 Volt lithium coin batteries don't get the job done, simply mail them back for a full refund, no questions asked.