Duracell High Power Lithium batteries offer reliable, long-lasting power for your specialty devices. Duracell is the #1 trusted battery brand, so you know it's a battery you can trust. Duracell specialty batteries provide the performance you need for your critical devices, and are backed by Duracell's battery guarantee. Lithium coin cell battery. Specified for use with medical devices, watches, fitness devices, security devices, electronics and more. Volt: 3.0. Size (mm): 24.5 X 5. mAh: 620. Equivalent to DL2450 and CR2450. Safety Data Sheet.