Energizer CR2025 Lithium coin batteries offer long-lasting and dependable performance in a variety of speciality devices. Each battery holds power for up to 10 years in storage, ensuring they are always ready when needed. These batteries are ideal for heart rate monitors, remotes, keyless entry systems, calculators, and toys. They are secured in child-resistant packaging for safety and perform reliably in extreme temperatures, from -30º to 60º C. From the makers of the world’s longest-lasting AA batteries, Energizer Ultimate Lithium.