dual 18650 box mods questions

[Bert101]

I just picked up a Rage box mod. It has a mosfet and you can get them in parallel and series. Nice looking boxes. You can get the parallel in dual and triple cell.

How do you like that rage box? Im debating getting the dual 18650 parallel box but their switches look pretty skimpy.... I know it has the mosfet but for 120 bucks I dont want the switch to fail and this thing blow up in my hand.

 

[DaveSignal]

A MOSFET box isn't going to blow up in your hand because of the switch. There is very low current going through the switch. There are two entirely separate circuits.
batt + ---> (low mA flow) ----> switch ----> MOSFET -----> batt -
voltage on the above circuit allows the below circuit to be closed:
batt + ----> (high A flow) ----> atomizer ----->MOSFET -----> batt -

 

[Bert101]

A MOSFET box isn't going to blow up in your hand because of the switch. There is very low current going through the switch. There are two entirely separate circuits.
batt + ---> (low mA flow) ----> switch ----> MOSFET -----> batt -
voltage on the above circuit allows the below circuit to be closed:
batt + ----> (high A flow) ----> atomizer ----->MOSFET -----> batt -

Please excuse my ignorance.... but if the switch fails and stick open wouldn't my coils get continuous power until the coils fail or the batteries die? If my build is within safe max cdr of my batteries?