High-performance lithium-ion batteries like the 18650 AWT 3.7V 3500mAh 35A RAINBOW BATTERY [PACK OF 2] are made for demanding vaping applications. It has a 3500mAh large capacity, a 35A discharge rate, and a steady 3.7V voltage. Because of this, it's the perfect option for vapers who utilize high-wattage devices like sub-ohm tanks.