This part is a kind of semiconductor called CR2032.

Function of this product has Lithium Manganese Dioxide Battery.

Manufacturers : Sony Corporation

Image and pinout :

Some of the text within the PDF file :

DATA SHEET Lithium Manganese Dioxide Battery CR2032 Specifications Nominal Voltage Dimensions (mm) Diameter Height 20.0mm 3.20mm 3V 220mAh 0.3mA 12mA 3.2g Nominal Capacity (2.5V cutoff) Recommended Continuous Drain Recommended Pulse Drain Weight 0 Ø 2 0 . 0 –0.15 0.10MIN () ( ) Discharge Characteristics 2.5V cutoff At23˚C 4.0 0 3 . 2 –0.3 Ø16.9 Applications 15k 10k 3.0 Voltage 2.0 1.0 0.0 0 300 600 900 1200 1500 Discharge time DATA SHEET Discharge Characteristics on Load 2.5V cutoff At23˚C Discharge Characteristics on Temperature 4.0 2.5V cutoff Load 15k 3.0 3.0 23˚C Voltage Voltage 2.0 Load : 4.7k 1.0 0.0 0 300 600 900 1200 1500 Load : 15k 2.0 60˚C 1.0 0˚C 0.0 0 500 1000 1500 Discharge time Discharge time Discharge Load vs. Operation [ ... ]

CR2032 PDF Datasheet Download