AWT Batteries 20700 mAhAWT Batteries 20700 mAhThe AWT 20700 4200 mAH 40A 3. 7V battery is the latest battery to revolutionize the vaping industry and is the first custom designed electronic cigarette 20700 battery. Many experts in the industry are calling this the game changer. Made for demanding vaping devices this battery delivers 40 amps of power while maintaining a solid 4200mAh of capacity, all in a size that is only slightly larger than a standard 18650. Specification