BATTERY-CR2016

small electronics. Here is a quick breakdown of what those labels mean and how the battery works:
​Understanding the Labels
​CR2016: This is the standard international code.
​C stands for Lithium Manganese Dioxide chemistry.
​R means it is round (cylindrical).
​20 indicates the diameter is 20mm.
​16 indicates the thickness is 1.6mm.
​DL2010: This is often a manufacturer-specific equivalent code (like Duracell).
​3V: This is the nominal voltage. Most lithium coin cells operate at 3\text{V}, unlike standard AA batteries which are 1.5\text{V}