PN: CR1616 3VNOMINAL VOLTAGE: 3VNOMINAL CAPACITY (MAH)*1: 55NOMINAL DISCHARGE CURRENT (MA): 0.1OPERATING TEMPERATURE RANGE (DEG. C)*2: -20 TO +85DIAMETER (MM): 16.0MMHEIGHT (MM): 1.6MMWEIGHT (G)*3: 1.1GCHEMICAL SYSTEM: LITHIUM MANGANESE DIOXIDE