Specifications: 

Size: 18650

Style: Flat Top

Protected: unprotected

Nominal Capacity: 3500mAh

Discharge Current: 10A Max Continuous, Rated 30A Max Pulse

Nominal Voltage: 3.7v

Maximum Voltage: 4.2V

Approximate Dimensions: 18.39mm x 65.7mm

Approximate Weight: 46.9g