I read somewhere that the vaporking is at 3.7v and the passthrough is 5v. I have both and have been using them for almost 2yrs. I have been considering an ego mega 900mah. I have noticed that the megas are running 3.7. My main goal here is getting more TH (I know there are other methods of increasing TH like an actual bottle of TH which Im gonna try also). I dont notice too much of a difference with my passthrough vs the batt. What does the mah do exactly? Will I get the smae results with my Vaporking (kr808 batt) or am I waisitng my time and money trying to purchase an ego? I am reducing my nic levels and will eventually move towards no nic, but without or little TH, I cant do it. Without TH, its pointless for me to vape. I dont fell satisfied until I get really strong TH. So ego mega 3.7 volts 900mah TH = V4life vaporking 3.7/5v TH or will it be a big difference?