Single Efest 18650 rechargeable battery. 

18650, 3500 maH, and high output amperage of 20 amps. 

• Typical/Minimum Capacity: 3500mAh
• Max Continuous Discharge: 10A
• Max Pulse Discharge: 20A
• Lifespan: 300th cycle: >60% of 1st capacity @ 25 degrees celsius 
• Weight: 55g
• Length: 65.2mm
• Diameter: 18.5mm
• Temperature range: -20~+60 ºC 
• Monthly Self-discharge rate: ≤ 0.5% 
• Temperature range: Discharge: -20~+60 ºC, Charge: 0~45 ºC

This is the latest Efest IMR 18650 3500mAh battery with up to 10A of continuous discharge & 20A of pulse discharge. Perfect for those who do not need too much in power (in amps) & would rather have more capacity.

Suitable for any vaping device that takes this battery for eg:

Vaporesso swag version 2

Voopoo Drag x

Geekvape aegis x and Aegis boost plus