CR12600SE is a lithium-thionyl chloride cell manufactured by Mitsubishi Chemical Corp. It is a 3.6V primary non-rechargeable battery commonly used in memory back-up applications. This cell is particularly popular because of its outstanding shelf-life, and the fact that it can provide low self-discharge during long periods of inactivity. The CR12600SE offers an average capacity of 240mAh, with a diameter of 12.5mm and a height of 6.0mm.