PN: CR1220NOMINAL VOLTAGE: 3VNOMINAL CAPACITY (MAH) 1: 36NOMINAL DISCHARGE CURRENT (MA): 0.1OPERATING TEMPERATURE RANGE (DEG. C)*2: -20 TO +85DIAMETER (MM): 12.5MMHEIGHT (MM): 2.0MMWEIGHT (G)*3: 0.8GCHEMICAL SYSTEM: LITHIUM MANGANESE DIOXIDE