•Type: Lithium button/coin cell
•Nominal Voltage: 3V
•Diameter: 24.5 mm
•Height: 5.0 mm
•Capacity: Typically around 500-620 mAh (varies slightly depending on the brand)
•Chemistry: Lithium manganese dioxide (LiMnO₂)
•Applications: Low-drain, long-lasting devices like calculators, keyless entry systems, toys, medical devices, and various types of wearables.