The Panasonic CR2012 is a compact lithium manganese dioxide coin cell battery designed to provide a steady 3 V power supply for small electronic devices. With a nominal capacity of 55 mAh and a continuous standard drain of 0.1 mA, it reliably supports low-energy components that require a slim profile. Measuring 20.0 mm in diameter and only 1.2 mm in height, this lightweight 1.4 g cell fits into tight spaces where larger batteries cannot go. It is built to operate in challenging environments, maintaining performance across a wide temperature range from -30 to 85 °C, and meets safety standards such as IEC 60086-4 and UL 1642. This makes it a dependable choice for users powering specialized sensors or miniature gadgets that must function consistently regardless of the surrounding climate.