3.7v battery vapes at 6v???

[thundercat]

Ok sorry but this is the only place I can post at the moment. Ive ordered my Lavatube and having re-read the description it finally clicked that they use 1 x 3.7v battery. Am I being thick here. How does it vape up to 6v???

Andy

 

[markfm]

They use what is called a boost regulator, which draws extra current to get to a higher than 3.7V output. No magic, but it will shorten the useable runtime between recharges due to some losses in up-converting.

 

[thundercat]

Ok so there is only a certain amount of electricity in a battery. For example if there is qty 100 in a battery that will last 50 mins at 3v but if I draw it at 6v it will only last 25mins. Have I got it? im just trying to put it in terms I may be able to understand.

Or if I have £1 in my hand and I spend money at £1ph it will last me 1 hour but if I start to spend at £2ph its only going to last me 1/2 hour.

Andy

 

[GhosT81]

Ok so there is only a certain amount of electricity in a battery. For example if there is qty 100 in a battery that will last 50 mins at 3v but if I draw it at 6v it will only last 25mins. Have I got it? im just trying to put it in terms I may be able to understand.

Or if I have £1 in my hand and I spend money at £1ph it will last me 1 hour but if I start to spend at £2ph its only going to last me 1/2 hour.

Andy

Sounds about right to me but I may be wrong, I'm still pretty new to this.

 

[tj99959]

Boosters work really well, and they have been used in different applications for many years.
The booster coupled with a switching regulator allows for surprising battery life. Also since the extra voltage comes from caps, not directly from the battery, the battery charge duration isn't effected even close to what you think it would be.

 

[markfm]

Right ballpark, but you need to work in power (watts) and total energy (Watt-hours).

A battery has a voltage and a current capacity (mAh). Say it is 4V, and the current capacity is 500 mAh. 4V x 500 mAh = 2000 mWh (milliWatt-hours) = 2Wh. That is the total energy in the battery.

Take a 2 ohm cartomizer, stick it on the battery. 3 volts / 2 ohms = 1.5 amps of current are pulled when it is firing, and the power draw when firing is 4 volts x 1.5 amps = 6 Watts. That 2Wh of energy is in theory enough to drive the cartomizer for 2Wh/6W = 1/3 hour of actual use time, 20 minutes.

Say you buy a mod with a boost regulator, and it can output 6V with that 3V battery. If you keep the 2 ohm cartomizer, you are now drawing 6V/2 ohms = 3 amps of current, and the power draw when firing is 6 volts x 3 amps = 18 Watts (three times the power).
That 2Wh of energy in theory can drive it for 2Wh/18W = 1/9 hour, about 6-1/2 minutes.

In reality, the boost regulator has an efficiency loss, so instead of 6-1/2 minutes you would get a bit less use. This is actual use time, the button pressed and cartomizer heating liquid.

(In reality, taking a 2 ohm cartomizer to 6V is probably not going to work well, the atomizer would pop and/or the eliquid would taste like crud; though some people do like real high voltage vaping they tend to use specialized atomizers with higher resistance.)

 

[Vapoor eyes er]

Batt Info
on a single coil carto 100 mah= 1 hour vaping
on a dual coil carto 100 mah= 1/2 hour vaping
So if your batt is 1000 mah on a single coil it will last for approx. 10 hrs, minus the 25% recharge point so it will last 7.5 hrs.
You want to recharge your batts at 25%- they'll last longer. They are all approximate numbers.

Ok so there is only a certain amount of electricity in a battery. For example if there is qty 100 in a battery that will last 50 mins at 3v but if I draw it at 6v it will only last 25mins. Have I got it? im just trying to put it in terms I may be able to understand.

Or if I have £1 in my hand and I spend money at £1ph it will last me 1 hour but if I start to spend at £2ph its only going to last me 1/2 hour.

Andy

 

[markfm]

Most proprietary PVs (KR808, 510, eGo/Riva), and the VV mods like Lava tube/Provari/Buzz Pro, have protection circuitry that will kick in before the battery can be over-discharged. You don't have to guess when it is time to recharge, it is safe to vape them until they stop running. On an 808 or eGo the PV will flash multiple times, output no vapor, when it is time to recharge. On my notcigs equipment something similar happens, I get a different LED and it stops firing.

Pure mechanical mods, without protection circuitry, are different.

 

[dormouse]

Things that put out more voltage than the battery does may use a booster circuit with a capacitor that collects power when the battery is charged and stores it, then releases it in addition to the battery's own power to boost the voltage.

 

[sgraves66]

Keep in mind too that these calculations equate to sustained power consumption. In reality, you'll most likely get more - vaping incurs a burst of power, peeking at some point and downtime between puffs.

I thought I was a chain vapor, but 650mah batteries last me well over a day - have yet to fully discharge them. I tote 2 flavors with 2 batts, so technically I have 1300mah. I give equal time to both throughout the day.