This part is a kind of semiconductor called CGR18650CG.

Function of this product has Lithium Ion Batteries.

Manufacturers : Panasonic

Image and pinout :

Some of the text within the PDF file :

LITHIUM ION BATTERIES: INDIVIDUAL DATA SHEET CGR18650CG: Cylindrical Model Discharge Characteristics 5.0 CGR18650CG Voltage (V) External Dimensions (mm) *2 4.5 4.0 3.5 3.0 2.5 0 Charge Condition: CVCC 4.2V Max. 0.7It (1500mA), 110mA cut-off at 20ºC Discharge Condition: 1It (2150mA), 3.0V cut-off 45ºC 20ºC 10ºC +0 18.6 - 0.7 (+) -10ºC 200 400 600 800 0ºC 1000 1200 1400 1600 1800 2000 2200 2400 2600 Discharge Capacity (mAH) 65.2 - 1.0 +0 5.0 4.5 Charge Condition: CVCC 4.2V Max. 0.7It (1500mA), 110mA cut-off at 20ºC Disharge Condition: Constant Corrent, 3.0V cut-off at 20ºC Voltage (V) 4.0 3.5 3.0 2.0It (4300mA) 1.0It (2150mA) 0.2It (430mA) (With Tube) 2.5 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 (-) Discharge Capacity (mAH) To ensure saf [ ... ]

CGR18650CG PDF Datasheet Download