VV question : dna30 and 30amp 18650 battery

[imb1610]

So i have been owning a VV mod since the first vamo came out i thought i knew what i was doing until recently i just bought a dna 30 clone mod so i ordered a sony 30amp 18650 (i was previously stacking dual 18350's in my VV devices) but now with this new 18650 (it came before the clone dna 30 mod) i put it in my ecig and it seems it can only pull 4.8volts from it so how the heck is the new dna 30 mod going to pull the full 30 watts if the voltage cant push past 4.8 on a mod with half the power? i assume that if i switch it to watts it wont make a difference since it cant pull more than 4.8 volts but if i am wrong please correct me im using a 1.5-1.7ohm rebuildable(this build keeps changing resistance) any help is appreciated

 

[kiwivap]

Your power is a result of the volts and the amps, and resistance will factor in also. Volts x current (amps) = power (watts). So you need to check the maximum continuous discharging current for your battery - which will be in amps. For example, the SONY VTC4 18650 2000mAh Battery has a max continuous discharging current of 30A. At full charge the volts are 4.2 v.

If you were using that battery with a 1.5 ohm coil and wanted to vape at 25 watts you would need a capacity of 4.082 amps. Your 30 amp battery could handle that. You can use ohms law, or an online ohms law calculator, to work this out. You need to monitor the battery so that it doesn't over-discharge.

If the resistance of your coil keeps changing the way you have described it is usually unstable, which means it may have a hotspot (those are not always visible) and could cause a short. You need to tweak or rebuild it so that its stable.

 

[steved5600]

The most common way of doing this is converting the DC into an AC and stepping it up with a transformer then they can convert it back to a higher DC voltage and they can vary it buy using either Pulse width modulation or an adj. voltage regulator or adjust the amplitude of the AC. I'm only familiar with pulse width modulation but they could use the other methods. It's basically a DC - DC converter.

 

[JeremyR]

I assume your talking you put it in the vamo.. In *single battery configuration with the vamos 2.5-3 amp limit, in single mode, that's all you can pull at that ohm... 1.7ohm @ 4.8v is 2.8 amps... So appears that the vamo is 2.8 amps in single battery mode with fully charged battery.

Which is why you run stacked as I do in the zmax for anything less than 2.4 ohms. (Stacked 18350 gives you 5amps on the vamo, 4 on the zmax) The DNA 30 has a different converter that can boost to a higher level.

While you can't repost here you can PM us with your answers/questions.

 

[wv2win]

I assume your talking you put it in the vamo.. In single battery configuration with the vamos 2.5-3 amp limit(?) that's all you can pull at that ohm... 1.7ohm @ 4.8v is 2.8 amps... Which is why you run stacked as I do in the zmax for anything less than 2.4 ohms. (Stacked gives you 5amps on the vamo, 4 on the zmax) The DNA 30 has a different converter that can boost to a higher level.

While you can't repost here you can PM us with your answers/questions.

The Vamo has a 5 amp limit. With two 18350's, you can realize the full 15 watt capability of the Vamo, which isn't possible with an 18650 battery.

 

[Hoosier]

... how the heck is the new DNA 30 mod going to pull the full 30 watts if the voltage cant push past 4.8 on a mod with half the power? ...

I don't know about the clone, but the DNA 20 and 30 don't work the way your other mod does. They can take current from the battery and add it to the battery voltage. This is called a boost circuit. (You can look up the basic design of boost circuits as they have been around longer than personal computers.)

A battery is a power source. At full charge, 4.2 Volts, and at the rated capacity of 30 Amps, your battery is capable of outputting over 100 Watts. With the proper circuitry to adjust the electrical characteristics to account for the load's resistance (the coil), using the battery's power supply to it's potential isn't a problem.