I just came across your comments about the SID and using lesser batteries in any vv / vw mod. I'm curious if this may apply to the issue I am encountering.
I unpacked my SID today, tossed in a freshly charged UltraFire 2400 mAh 18650, and was greeted with "smok" on the display. Looks good. I press the fire button three times to enter the menu, can see all the options as expected - resistance at 1.4 ohms on a LR 1.5 ohm atty, battery shows 4.1v on a 3.7v 18650.... ok. Everything looks good so far. Let's go ahead and start vaping!
Hit the fire button, and get nothing. It flashes the resistance on the display very briefly, and then it goes blank. No vapor from the two atty's and the clearo I tried on it. Pressing the fire button again doesn't do anything, it doesn't display the resistance nor can I enter the menu again. I have to pull the battery and reset the entire unit just to be able to access the menu again. I had tried two different UltraFire batteries, two atty's, and a clearo, and get the exact same results with every combination of the above.
I'm thinking I got a dud, but am curious if anyone else may have encountered a similar issue.
Pull the middle post on the SID with tweezers or something thall grab it. i had the same problem but luckily id encountered it on different devices in the past