Quick DetailsPlace of Origin: Guangdong,Website:://.trustfirelight.com, China (Mainland) Brand Name: TrustFire Model Number: 18650 Type: Li-Ion, Li-ion Battery 3.7v Nominal Voltage: 3.7V Size: 65.3±0.3mm(L)*18.3±0.2mm(D) Nominal Capacity: 2400mAh Discharge: 1C~2C Design: Button top or Flat Top Feature: With PCB Working Voltage: 3.7v~4.2v Net Weight46g: 51g Charge Temperature: 0°C~45°C Discharge Temperature:  -20°C~60°C Logo: TrustFire or Customized Service: ODM/OEM Packaging