quick coil/battery question

[rum87mage]

Okay so lets say I have one 0.8 ohm coil on a fresh vct 3 that reads at 4.2 volts full charged. according to the ohms law calculator its hitting at 5.25 amps.
the question is if i run dual 0.8 ohm coils does that mean it will hit 10.50 amps? second question running two 0.8 ohm coils does that make the resistance go up to 1.6ohm? sense its 2 coils?

 

[Sgt.Rock]

Dual .8 coils will give you .4 ohms, not 1.6

Around 44 watts and 10.5 amps

 

[rum87mage]

ok so running dual coils cuts the ohms in half ?like dual 1.0 ohm coils would be .5 resistance then you put that in the ohms law calculator and get the amps? to make sure your not over doing the amp limit on the battery

 

[DaveP]

Coils can be electrically connected in parallel or series. If they are side by side it's parallel. If they are connected end to end, they are in series.

Almost all ecig coils are parallel and equal resistance, so you can add the resistances and then divide by 4 to get the combined resistance.

When you connect two coils in parallel, you divide the total by 4 to obtain the combined resistance. For more than two, there's a formula for multiple connections.

Parallel Resistor Calculator R1 + R2 = equivalent resistor R resistance circuit equiv total resistor finder made easy piggyback = parallel - sengpielaudio Sengpiel Berlin

 

[supertrunker]

Coils can be electrically connected in parallel or series. If they are side by side it's parallel. If they are connected end to end, they are in series.

Almost all ecig coils are parallel, so you add the resistances and then divide by two. I've seen 4 coils on an RDA. That would be two coils in parallel connected to two other coils in parallel.

When you connect two coils in parallel, you divide by two to obtain the combined the resistance. For more than two, there's a formula for multiple connections.

Parallel Resistor Calculator R1 + R2 = equivalent resistor R resistance circuit equiv total resistor finder made easy piggyback = parallel - sengpielaudio Sengpiel Berlin

I'm not sure what this step achieves?

T

 

[JeremyR]

Yep duals cut resistance in half and double amp load. Double the amp load will run the battery down twice as fast also.

 

[DaveP]

I'm not sure what this step achieves?

T

Should have said for 2 equal resistance coils in parallel you can effectively add the two together and divide by 4 to obtain the resistance of the two in parallel. Good catch.