A Lithium coin battery is a sub category of primary batteries. The name is derived from the shape which resembles a coin. Both the types i.e., disposable and rechargeable are available in the market in a variety of sizes. Some common applications are wrist watches, calculators, hearing aids, RTC, sensors, motherboard (to keep the time and date updated), memory units etc.  The battery used in this article is disposable type. The key chemical constituents are Lithium, Manganese oxide and an organic electrolyte. The voltage range for these types of batteries varies from 1.5V to 3.7 V. When used in a device or to power an electronic circuit the polarities should be properly taken care of else it may result in distortion, leakage, overheating, explosion or fire thereby damaging the device.