Even after all this time, something I can not get my head round, batteries.

[conanthewarrior]

Hi everyone, and I want to say thank you to everyone that takes the time to read my threads, and help me in my path of learning.

I will get straight to the point. I have learnt loads here, how mods work, how TC works, building coils, ohms law, safety-I learned it all from here and youtube.

Now, I understand the majority of our 18650 regulated mods are wired in series, not parallel-which leads me onto the question, why do dual battery mods last longer if only the voltage is boosted in series, as a parallel build doubles MAH.

I am not an electrician, so do not understand this fully.

So, in theory, its double the voltage, but same capacity.

Is it so simple that it is just because there is TWO batteries at 2500MAH, that they drain a lot slower and give longer life? As we all know, dual battery mods last much longer than single between recharges.

I was only thinking this as I got my first dual parallel mech yesterday, and am loving it. The battery life is so much better, I am definitely getting another higher quality copper one.

So, is it that simple and I have it correct? Or is there another explanation?

It may be because it is literally so simple I am thinking into it too much. But seeing as there is two, and they run a lot longer, would it not be equivalent to a 5000MAH pack even though it would read out as 2500MAH speed of battery drain wise?

Thank you all, Conan.

 

[Wingsfan0310]

I'll give it a shot. You can think of it like this. One 2500mah 18650 will give you 9.25 watt hours of energy. Two will give you 18.5 watt hours of energy. Watt hours = amp hours (2.5 each n this case) x nominal voltage (3.7v each in this case). It's the same whether wired in series or parallel.

I think I understand your confusion in how they are wired. What you have to remember is whether wired in series or parallel, the chip will step up or down voltage and do the opposite to the current (amperage). The only energy that is lost (or consumed) in the process is the inefficiency of the chip (in heat). Most chips are 90%+ efficient so it's not a big deal. Remember power (watts) = voltage x current, so as one is boosted the other is decreased proportionally and vice versa. Hope that helps! I'd be happy to try and further assist you if necessary. Hope everything is ok, haven't talked to you in awhile.

Happy Holidays,
Steve

 

[conanthewarrior]

I'll give it a shot. You can think of it like this. One 2500mah 18650 will give you 9.25 watt hours of energy. Two will give you 18.5 watt hours of energy. Watt hours = amp hours (2.5 each n this case) x nominal voltage (3.7v each in this case). It's the same whether wired in series or parallel.

I think I understand your confusion in how they are wired. What you have to remember is whether wired in series or parallel, the chip will step up or down voltage and do the opposite to the current (amperage). The only energy that is lost (or consumed) in the process is the inefficiency of the chip (in heat). Most chips are in the 90%+ efficient so it's not a big deal. Remember power (watts) = voltage x current, so as one is boasted the other is decreased proportionally and vice versa. Hope that helps! I'd be happy to try and further assist you if necessary. Hope everything is ok, haven't talked to you in awhile.

Happy Holidays,
Steve

Hi mate, nice to hear from you man .

I understand now- W/h's. I knew about W/hs from my DNA 200's-and I even remember working out the Watt hours for the Wismec DNA200, but I never got that as the shop was sent the RX200's instead, so got an Efusion.

It makes complete sense to me now using the watt hour system. So essentially, wether series or parallel, the watt hours do not change. That makes sense and I understand it now. Thank you-it's something I should know, or even DID know, but just did not think of using that method.

Everything is good my end thanks mate, how about you? I'l have to shoot you a PM sometime soon mate .

 

[Angrygod50]

Don't know if this helps but I=P/V so at 200watts /4.2volts = 48amps ; 200watts/12volts=16amps so your using less current at higher voltages so the batteries will last longer.. That's also why a a lot of 200 watt mods have li-po packs or 3 18650. The ones that don't use around 12v pulse at higher wattage's.

 

[Wingsfan0310]

it's the same either way. Wired in series it takes 16 amps from each battery. Wired in parallel it takes 48 amps but it's split between the 3 batteries so it's still 16 amps per battery (48/3).

 

[ej1024]

That's the beauty of regulated mods, you don't have to be this GUY....



VAPE ON

 

[Wingsfan0310]

The main advantage to wiring the batteries in series is with 11.1v (nominal), the chip only has to step down voltage. With mods wired in series (3.7v nominal), it would have to be able to both step up and down voltage (more expensive) depending on your resistance and power setting..

Cheers,
Steve