The Sony VTC4 is the best 18650 battery available for high drain vaping applications. These batteries are genuine OEM Sony VTC4, they are chemically safe, and they perform like none other.
Flat Top Dimensions: 65.0mm (L) x 18.2mm (D)
Max Continuous Discharging Current: 30A
Discharge cut-off voltage: 2.5V
Full Charge Voltage: 4.2V