Help me understand dual vs Single

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AvaOrchid

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So I only ever use single battery mechanical mods and I usually built around .3 for them because that's where I find it to be satisfying and where I feel confident. But could someone explain to me why anyone would want to use a dual battery series Mechs if it limits you even further in what you can build? I would have thought that using two batteries would take the strain off the battery not add more strain to the batteries if anything. Also I believe this chart is going off 4.2 which most people don't go off of that's like super safety mode most people go off 3.7. I'm never going to buy a dual battery series mechanical mod I have no interest it doesn't fit a need that I have but I just can't wrap my brain around how that works why a dual-battery becomes more risky somehow with your build and you have to build higher for it. Like I do occasionally use a mechanical mod and I know how to use the calculators and I know how to look up the ratings for mooch but I don't really understand the nitty-gritty of why dual battery would cause such a problem that you had to build higher.
 

Ben85

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In essence, series mods double the voltage which would then double the current draw at the same fixed resistance. As you need to build to your battery, you need a coil of a higher resistance in order to bring the current back down.

Personally, series mods are a waste of time IMO. Parallel in the other hand is a bonus.
 

sonicbomb

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More batteries = more power and/or run times.

Parallel - Batteries in a parallel configuration will have the combined amp limits and the combined mAh capacity of both batteries, but voltage remains the same. This configuration provides a large amp pool allowing high power levels with high mass super low resistance coils.

Series - Batteries are configured ‘end to end’ electrically. This doubles(ish) the available voltage, mAh and amp capacity remain the same. This configuration gives you a large voltage pool allowing the use relatively high resistance coils and still deliver high power levels.

At the end of the day a pair of batteries with contain a certain amount watt hours. How this is delivered is dictated by the resistance of the coil.

Understanding Battery Capability/Capacity | E-Cigarette Forum

Understanding the relationship between power and coil resistance | E-Cigarette Forum

Ohms/Watts Law - Calculating safe amp usage | E-Cigarette Forum
 

mimöschen

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Series mechs can give you a very cloudy experience without stressing the cells.
With a single cell 21700 mech my coils are usually around .15 - .2ohm, which equate to an ampdraw of about 25A.
On my series mechs the resistance is usually between .4 and .5ohm, so the ampdraw drops down to about 15A although both the calculated wattage and vapor output increase significantly.
 
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