whats better for dual mech in series or in parralell ??
They both allow you to achieve higher watts, but they way they go about it is different. Let's explore this with an example:
First, we have a single-battery mech mod. Let's use some nice round numbers and say it's charged to 4.0v, with an atomizer resistance of .5 ohms. The amp drain on the battery is "volts / ohms" so, 4 / .5 = 8 amps.
This will be our "target." At these values, the setup is producing 32 watts of power (amps * volts -- 8*4,
or volts * volts / ohms -- 4 * 4 / .5). With two batteries, we should be able to achieve twice that wattage, at the same amp draw. Let's find out how.
In a
parallel mech, the voltages are averaged. Since the two cells should always be at the same voltage as each other, this is a really easy calculation. We already defined that we're talking about 4v cells. So, what's the "average" of two 4-volt cells? 4, plus 4, divided by 2, equals 4. So we're still looking at 4 volts. In parallel, the amp load is "shared" between all cells (all both of them, in this case.) So if each one can handle 8 amps (it can maybe handle more, but remember 8 amps is our "target") then as a pair, they can handle 16. With a "ceiling" of 16 amps, that means you can use resistances down to 0.25 ohms (4 / 0.25 = 16) meaning you can use half the resistance you could with a single cell. At these values, the setup is producing 16*4 or 4*4/0.25 = 64 watts of power. Twice the power of the single-cell mod, but at the same amp draw per cell.
In a
series mech, the voltages are
summed, and the full amp load is "felt" by each battery. So with 2x 4-volt cells, we're looking at 4 + 4 = 8 volts now. With 8 volts, and a target of 8 amps, we can now only put a 1-ohm or higher atomizer on this device (8 / 1 = 8). That's
twice the lowest safe resistance of the single-cell. But, what happens when we calculate power? By doing the calculations for volts*amps (8*8) or volts*volts/ohms (8*8/1) we can see that the power output is still 64 watts with this setup, even though you now have a 1-ohm coil. Again, it's twice as much power (wattage) as the single cell, but at the same 8A draw.
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TL;DR: Parallel
allows you to build lower ohms, series
requires you to build
higher ohms. Both can achieve higher wattage than a single cell.