Coin lithium manganese dioxide batteries are widely used, from quart watches and clocks, to the long-term reliability of the backup power supply to TPMS (tire warning monitoring system), IoT equipment and car keyless entry system within 10 years. Therefore, the market for coin lithium manganese oxide batteries is rapidly expanding. In this diversified electronics sector, Murata is developing and producing coin lithium manganese dioxide batteries from a new perspective: it is meeting market demand while accumulating data on battery discharge characteristics, long-term reliability and safety characteristics. The lithium metal used for the anode of the coin lithium manganese dioxide battery has a maximum capacitance per unit weight (3. 86 Ah / g in all materials available for the anode). Therefore, a battery having a high energy density can be produced. Moreover, by using different active materials as the cathode, batteries having different characteristics can be manufactured. Murata has commercialized a coin lithium manganese dioxide battery that uses manganese dioxide as an active cathode material for excellent stability.