Minimum Safe Resistance

[JoeSmart]

I'm not interested in these crazy sub ohm mods. But for the sake of safety and tinkering, how do I calculate the minimum safe resistance for my battery (in a mech mod).

I have experience with electronic mathematics. So just throw some maths at me if you want?

 

[thedarthVap3r]

rather than throw maths.

ill just throw this at you.

1.0 - 1.6 or so is the optimal range for your battery . your batteries will be pushing out 3.7v and likely have around a 2.5-3amp limit on them

the only time youll need to worry about your batteries is if you start sub ohming , thats when the maths comes into play and you need a higher amp battery.

id advise ou get a multimetre to check your coil resistance , dont wan your coil shorting out , but then again its no huge deal as your batteries will be protected.

you may want to get a hot spring for extra piece of mind , im not sure if the device i sent you has one or if its just a standard spring, basically it heats up too much , itll collapse breaking connection to your battery , this is more for cases were you forget to lock it and its firing in your pocket. as if your coil is shorting , youll feel your battery getting hot

 

[JoeSmart]

rather than throw maths.

ill just throw this at you.

1.0 - 1.6 or so is the optimal range for your battery . your batteries will be pushing out 3.7v and likely have around a 2.5-3amp limit on them

the only time youll need to worry about your batteries is if you start sub ohming , thats when the maths comes into play and you need a higher amp battery.

id advise ou get a multimetre to check your coil resistance , dont wan your coil shorting out , but then again its no huge deal as your batteries will be protected.

you may want to get a hot spring for extra piece of mind , im not sure if the device i sent you has one or if its just a standard spring, basically it heats up too much , itll collapse breaking connection to your battery , this is more for cases were you forget to lock it and its firing in your pocket. as if your coil is shorting , youll feel your battery getting hot

You never fail to come to my rescue.

So a duel coil of 32 guage kanthal wire (1.2ohms per inch) using 2 inches of wire for each coil would give me approx 1.2ohms resistance total.

 

[thedarthVap3r]

You never fail to come to my rescue.

aslong as its not sexual fustration, sure thing.

 

[JoeSmart]

aslong as its not sexual fustration, sure thing.

So a duel coil of 32 guage kanthal wire (1.2ohms per inch) using 2 inches of wire for each coil would give me approx 1.2ohms resistance total.

 

[whit77]

Efest 18350 imr have around a 4/5 amp limit, 18650 imr considerably more

 

[thedarthVap3r]

So a duel coil of 32 guage kanthal wire (1.2ohms per inch) using 2 inches of wire for each coil would give me approx 1.2ohms resistance total.

when doing dual coil , it halfs the resistance. so to get a 1ohm dual coil set up , you need 2x 2.0hm coils.

 

[JoeSmart]

when doing dual coil , it halfs the resistance. so to get a 1ohm dual coil set up , you need 2x 2.0hm coils.

Yeah, kanthal A1 is apparently 1.2ohm per inch, so 2 inches of wire used is a 2.4ohm coil So if I used 2 of them I would be hitting 1.2ohms. Which is within your recommended resistance for these batteries.

Unfortunately these batteries, after doing research, are cheap knock offs from china, most likely recycled laptop cells so I'll be buying some new ones. Anyways, I did some research and found out they have a 3.7A max current drawer. So this would mean a minimum safe resistance of 0.82ohms (recurring of course). So a resistance of around 1.2ohms sounds reasonable.

 

[whit77]

Yeah, kanthal A1 is apparently 1.2ohm per inch, so 2 inches of wire used is a 2.4ohm coil So if I used 2 of them I would be hitting 1.2ohms. Which is within your recommended resistance for these batteries.

Unfortunately these batteries, after doing research, are cheap knock offs from china, most likely recycled laptop cells so I'll be buying some new ones. Anyways, I did some research and found out they have a 3.7A max current drawer. So this would mean a minimum safe resistance of 0.82ohms (recurring of course). So a resistance of around 1.2ohms sounds reasonable.

Spend 10/20 quid on some efests, I've got some 12 months old still going strong

 

[Gilliandrea]

@JoeSmart and thedarthVap3r check this out on the wiki

Wire & Ribbon