Manufacturer:  
  Efest
Size:  
  18650
Style:  
  Flat Top
Protected:  
  NO, UNPROTECTED. This cell is unprotected and intended for use in protected battery packs only and NOT individually or as a standalone product. In order to operate safely it must have additional protection in the form of a PCB (protection circuit board) or BMS (battery management system), which is not included.
Nominal Capacity:  
  3500mAh
Discharge Current:  
  10A Continuous, Rated 20A Max Pulse by Efest
Nominal Voltage:  
  3.7V
Maximum Voltage:  
  4.2V
Approximate Dimensions:  
  18.25mm x 65.25mm
Approximate Weight:  
  47g
Origin:  
  China