Wrong info about parallel curcuits

Status
Not open for further replies.

PeteB

Full Member
Jan 6, 2019
14
17
Regulated devises using batteries in parallel in fact do double the mah of the batteries and the load will only take what is required, .... This is because all devices are in the end just resistors be it fixed value ... amps, doesn't mean that the power supply will force 10 amps through the circuit..I see a lot of people say it doesn't matter if mods are wired in series or parallel..They are WRONG!
 

sonicbomb

Vaping Master
ECF Veteran
Verified Member
Feb 17, 2015
8,362
23,817
1187 Hundertwasser
In a regulated mod, the coil isn't connected to the battery. The regulator chip is. It decides what to draw from the batteries, and what to deliver to the coil.
Most multi battery regulated mods have the batteries in series as this slightly more efficient, especially for delivering high wattages.

Calculating battery current draw for a regulated mod | E-Cigarette Forum
 

PeteB

Full Member
Jan 6, 2019
14
17
In a regulated mod, the coil isn't connected to the battery. The regulator chip is. It decides what to draw from the batteries, and what to deliver to the coil.
Most multi battery regulated mods have the batteries in series as this slightly more efficient, especially for delivering high wattages.

Correct but HALF THE STORY..The chip is still a resistor in the circuit, No chip efficiency will make up for doubling 4800 mah from a Samsung 48G.The chip will take only as much needed even at the 10% efficiency loss of a DNA75c.

Calculating battery current draw for a regulated mod | E-Cigarette Forum
 

Ryedan

ECF Guru
ECF Veteran
Verified Member
Mar 31, 2012
12,869
19,652
Ontario, Canada
Regulated devises using batteries in parallel in fact do double the mah of the batteries and the load will only take what is required, .... This is because all devices are in the end just resistors be it fixed value ... amps, doesn't mean that the power supply will force 10 amps through the circuit..I see a lot of people say it doesn't matter if mods are wired in series or parallel..They are WRONG!

Multiple batteries, aka battery packs, are better rated in watt hours than mAh.

Dual 3Ah (3000 mAh) batteries in series output an average of 7.4V and rate 3 Ah.
Watt hours = V * Ah = 7.4 * 3 = 22.2 Wh

Dual 3Ah (3000 mAh) batteries in parallel output an average of 3.7V and rate 6 Ah.
3.7 * 6 = 22.2 Wh

Both circuits will output 22.2 watts for an hour, or 11.1 watts for 2 hours, etc. Individual battery amp draw is the same in series and parallel at the same regulator power output and maximum regulator watt output is also the same with the following caveat.

Regulation efficiency is a little different for each of these circuits, but that is due to the regulator chip, not the battery circuit. Regulator efficiency also changes with different watt outputs or coil(s) resistance values using the same mod, batteries and the same circuit.

So, for all intents, it really doesn't matter if the mod is wired in series or parallel :)
 

Baditude

ECF Guru
ECF Veteran
Apr 8, 2012
30,394
73,076
71
Ridgeway, Ohio
The type of chip makes a big difference in how efficient it handles battery power. The more elite chips like Evolv's DNA utilizes battery power more efficiently. The chip's voltage cutoff point also makes a huge difference in how long a battery will last per charge. If the cutoff is 3.2 volts the battery will last longer than if the voltage cutoff is just 3.6 volts.

I have a Wisemic RX200 whose three batteries would only last a bit more than 1 day. My current single battery DNA chip mod lasts a full day with the same batteries and same wattage setting.
 

PeteB

Full Member
Jan 6, 2019
14
17
Multiple batteries, aka battery packs, are better rated in watt hours than mAh.

Dual 3Ah (3000 mAh) batteries in series output an average of 7.4V and rate 3 Ah.
Watt hours = V * Ah = 7.4 * 3 = 22.2 Wh

Dual 3Ah (3000 mAh) batteries in parallel output an average of 3.7V and rate 6 Ah.
3.7 * 6 = 22.2 Wh

Both circuits will output 22.2 watts for an hour, or 11.1 watts for 2 hours, etc. Individual battery amp draw is the same in series and parallel at the same regulator power output and maximum regulator watt output is also the same with the following caveat.

Regulation efficiency is a little different for each of these circuits, but that is due to the regulator chip, not the battery circuit. Regulator efficiency also changes with different watt outputs or coil(s) resistance values using the same mod, batteries and the same circuit.

So, for all intents, it really doesn't matter if the mod is wired in series or parallel :)


Great!..now show everyone the math comparing 3000 mah to 4800...
 

PeteB

Full Member
Jan 6, 2019
14
17
In a regulated mod they are usually connected in series.

The device uses a buck boost to modulate the current draw.[/QUOTE


Makes no difference..Buck-boost converters are a form of switching-mode power supply that can supply a regulated DC output from a source voltage...It is not magic...It does not change the amount of energy stored from its source...
 

BrotherBob

ECF Guru
ECF Veteran
Dec 24, 2014
14,092
12,433
Sunnyvale,CA,USA
Regulated devises using batteries in parallel in fact do double the mah of the batteries and the load will only take what is required, .... This is because all devices are in the end just resistors be it fixed value ... amps, doesn't mean that the power supply will force 10 amps through the circuit..I see a lot of people say it doesn't matter if mods are wired in series or parallel..They are WRONG!
Welcome and glad you joined.
 
  • Like
Reactions: PeteB
Status
Not open for further replies.

Users who are viewing this thread