Been vaping at 5v for the last week. I've been vaping for about 2 months total now, started with a 510 then moved on to an eGo, then to a 5v box. I've been waking up with a very sore throat, and vaping is making it hurt more. I think I may go back to my eGo for a while. I may try some lower nicotine liquid at 5v also, I have plenty of TV doubler left to vape at 0 nic if I need to. Anyone else find 5v just a tad too much?