You need to do a loaded volts test. There is no 18650 made that vapes at 4.2 volts.The 18650s look great. I want to buy one... The only concern I have is that they are regulated at 3.7? My understanding is that means even when the batt is fully charged at 4.2, the NoEgo will only put out 3.7? If so, may be a dealbreaker for me as I depend on that 4.2.![]()