voltage drop increase on low ohm coils? That's a pain.

[Stefan Liao]

So I tested a mod with a 1 ohm coil and the voltage drop was an outrageous .18. but when I test it on a .4 ohm coil (sony vtc4 batteries) the voltage drop increases to .4-.5 sometimes more. any advice?

 

[gcfernandez]

There's nothing you can do about that. The lower the resistance of your coil, the higher the amp draw is on the battery. The higher amp draw creates more internal resistance in the battery and leads to higher voltage drop.

My .4ohm build did .45 volt drop. Same atomizer at .2ohm did .65-.7 volt drop

 

[p.opus]

So I tested a mod with a 1 ohm coil and the voltage drop was an outrageous .18. but when I test it on a .4 ohm coil (sony vtc4 batteries) the voltage drop increases to .4-.5 sometimes more. any advice?

There's no violating Ohm's law.....

 

[Ryedan]

So I tested a mod with a 1 ohm coil and the voltage drop was an outrageous .18. but when I test it on a .4 ohm coil (sony vtc4 batteries) the voltage drop increases to .4-.5 sometimes more. any advice?

On a freshly charged, almost new VTC4 I get around 0.35V drop with a 0.5 ohm coil. It's normal. Most of it comes from the battery's internal resistance. The power output is still higher than using a higher resistance coil.

If you want a really good explanation of voltage drop and how it works with vaping, read this; Voltage drop under load explained well.