Need help understanding Ohms and Watts

[CONCERTO]

If I had a build that was 1.2 OHMS and I was putting about 3.00 VOLTS to it, the wattage would be roughly 7.5 WATTS




Now if I build a high resistance coil thats 6.5 OHMS and put about 7.0 VOLTS to it I get almost the same wattage.


Should I favor one build over the other? What would the differences be? Pros/cons?
Thank you all.

I'm thinking that I should go with the low OHM coil build because the wire is thicker and it may have better durability.

 

[Bunnykiller]

okay cons first...
stacked batteries to achieve the volts needed requires more attention and battery care
higher ohms requires more "power" ( amps ) to heat the coil
hi ohm coils require more wire thus making the coil larger ( maybe even too big to fit in the atty)

pros:
a bigger coil produces more vapor due to increased surface contact with the wick

best bet... consider using 28 - 26 wire for durability and extended coil life, wrap the coil with a bigger dia to keep the length shorter, and try to keep the ohms around 1.6 - 2.2 for extended battery life.

 

[Moon86]

Ohms law
Voltage (E) = Current (I) * Resistance (R)
Power (watts) = Voltage (E) * Current (I)
I stick go lower resistance, longer batt life

Sent from my ADR6410LVW using Tapatalk

 

[olefolks]

If I had a build that was 1.2 OHMS and I was putting about 3.00 VOLTS to it, the wattage would be roughly 7.5 WATTS




Now if I build a high resistance coil thats 6.5 OHMS and put about 7.0 VOLTS to it I get almost the same wattage.


Should I favor one build over the other? What would the differences be? Pros/cons?
Thank you all.

I'm thinking that I should go with the low OHM coil build because the wire is thicker and it may have better durability.

Go to this site: Ohm's law | Steam Engine | free vaping calculators

 

[Maurice Pudlo]

Kanthal a1 coils don't go bad in any reasonable period of time, they just get yucky. Pull the wick, fire the device a few times, rewick, prime and vape. If you actually kill a coil you might want to move to a slightly thicker gauge (lower numerically).

Reasonable coil resistance will mainly depend on the device but it is safe to say that starting between 1.0 and 2.2 ohms is good for anything regulated with a few exceptions, and 0.6 to 1.0 ohms will serve well as a starting point on unregulated mods.

A 0.588 (lets call it 0.6) ohm coil on a fresh 4.2 volt 30 amp battery will put 30 watts to the coil in a perfect world. That's a good bit of power and plenty of safety margin as far as the amp limit goes.

I use this calculator because I'm lazy Ohm's Law Calculator

Maurice

 

[Baditude]

If I had a build that was 1.2 OHMS and I was putting about 3.00 VOLTS to it, the wattage would be roughly 7.5 WATTS

Using Ohm's Law: Ohm's Law Calculator

voltage: 3.0 volts
current: 2.5 amp draw from the battery
resistance: 1.2 ohm
watts: 7.5 watts

Now if I build a high resistance coil thats 6.5 OHMS and put about 7.0 VOLTS to it I get almost the same wattage.

Using Ohm's Law again...

voltage: 7 volts
current: 1 amp draw
resistance: 6.5 ohm
watts: 7.5 watts

 

[Baditude]

higher ohms requires more "power" ( amps ) to heat the coil

I stick go lower resistance, longer batt life

Wrong.

With battery voltage output being equal (like in a mechanical mod), higher resistance coils pull less amps from a battery than a lower resistance coil will, therefore HR coils will provide longer battery life. Lower resistance coils will drain more power from the battery than higher resistance coils. Again, using Ohm's Law:

Voltage (E): 4.2 volts
Current (I): 8.4 amp draw from the battery
Resistance (R): 0.5 ohm
Power (P): 35.28 watts

Voltage (E): 4.2 volts
Current (I): 4.2 amp draw from the battery
Resistance (R): 1.0 ohm
Power (P): 17.64 watts

The amount of amperage drawn from a battery is what determines battery longivity. As shown by the examples above, the lower ohm coil will draw twice the amps from a battery and will drain the battery faster.

 

[dice57]

Well if you are vaping at 3 volts, likely your batts are going to die before their time, because IMR batteries don't like being over drained and will cause them to loose the capacity to hold a charge.

It's all a balancing act of ohms, watts, amps, to attain the level of vape one wants to experience. More than one way to get there, and knowledge and skill in builds is the path that it takes..

Only adequate way to explain it is by you doing the research and practicing yourself to find what is best for you. I prefer builds no higher than 0.8 ohms, and most a bit lower.. But worked my way to get there. One vape at a time, That's how we learned.

Everything affects Vape, the build, wire, wick, juice, batteries, amps, watts, air..... and one must know their limitations.

 

[Maurice Pudlo]

Battery Life Calculator – Online Conversion Calculators | DigiKey

Ohm's Law Calculator

Use both to estimate battery life.

Maurice

 

[TreoTahoe]

Ohms law
Voltage (E) = Current (I) * Resistance (R)
Power (watts) = Voltage (E) * Current (I)
Lower Resistance=Longer Battery

Since I only have a Vamo I build around 1.6-1.8@8.5W it works for what i want to accomplish