Whilst I'm at it all ask another battery question

[mannyer]

So...in a duel 18650 box mod (unregulated), can someone please clarify the affect on current value (purpose of example 1 x 18650 20amp continuous) when in series and parallel please. I understand the principle of the value of the voltage but couldn't find anything to clarify the current values. And since you are all so lovely people you will probably answer my questions.

In that being said, when calculating ohms law to check atty compatibility, to what concideration should you take for a switch within the equation.

So much love to you all for helping

[thatguy]

Having cells in series makes the output voltage the sum of the cell voltages. i.e. 2x LI-ion cells in series = 2x3.7V=7.4V
Having cells in parallel does not increase output voltage hence 2xLi-ion cells in parallel =1x3.7V=3.7V


We all know Mr Ohm's law that V=IR, so with the fixed resistance of the atty you are using, if the voltage doubles (or triples on 3 cell series mods) then so must the current.

Put shortly, series cells increase the voltage and the current drain, parallel cells do NOT increase voltage or current drain, but increase the capacity (in mAh) of the setup.


In power tools it's common to see a combination of series and parallel to achieve the required voltage and to increase battery life to an acceptable standard.

This applies to all mech setups.

Regulated setups are somewhat different as the chips involved handle the output. It has even been postulated that series regulated mods such as the sigeli 100W provide longer cell life due to the voltage step down technology being used is more efficient than the step up technology used in parallel regulated devices.

[mannyer]

So series double current parallel no change. Wicked thanks

[VapingBad]

Nov 4, 2015 7:20:06 GMT mannyer said:

So series double current parallel no change. Wicked thanks

No, the opposite:
2 in series is the same current & double the voltage
2 in parallel is the double current & the same voltage

In series there is a single path for the current that should not exceed the max continuous current of the lowest rated battery, both batteries run at the same current, the voltages could vary. In parallel they have to be at the same voltage as they are connected, but they could be supplying different currents especially if they are not balanced.

[mannyer]

Yea I realised that after thinking about it haha thanks bud