i just finish one like the first four pictures.It`s VV works with 2x16340 only,varivolt from 0 to 8.4V, sensitive switch.Have revers polarity protection, short circuit protection, thermal protection
I sell this for
140$ without batt`s, priority shipped included (with tracking number),worldwide, expensive but seems it`s only way in this country.
Buyer pay
paypal fees.Contact PM.
http://www.youtube.com/watch?v=AtptX6nOgOE
PS:
For mods you need to use only protected batt`s.However, no matter how many protections have a
mod, the best is protected PCB or chemistry batt`s.