Why 4.2v? Why 1800s?

[sayurasem]

Can't sleep... So I'm just wondering why most of the APV is made for 1800s battery? Who decide the mod should use 1800s batteries with 3.7v?

is 3.7v the safest we can vape on? Just wondering even ego twist can go high as 4.8v...


ps. Is there any thread explaining the history of APV mod? Who invented and popularize it? I like history

 

[NicoHolic]

The "3.7 volt" batteries used in vaping start out fully charged at 4.2V and drop as they are used. They can be safely used with a no-load voltage of 3.2 or so, but by 3.6-3.7 volts, the vape is sufficiently less strong, so those who use an unregulated battery or mod (called "mechanical") swap batteries for a fully charged one at that point. The twists/spinners and regulated mods use a buck/boost regulator circuit that keeps the voltage to the coil at an adjustable constant voltage. The cost of providing higher than battery voltage to the coil is increased current draw from the battery.

 

[sayurasem]

Is there a reason why we stopped at 3.7v? I'm just a newbie with curiosity, is there any battery bigger than the 1800s? Howcome 1800s 3.7v is so popular?

 

[Krazirob]

when people started building their own attomizers and what not the need to adjust voltage was needed to compensate for the resistance they built their atty at. Way back when you bought an atty and it was made for the 3.7V we had. just my 2 cents

 

[NicoHolic]

Is there a reason why we stopped at 3.7v? I'm just a newbie with curiosity, is there any battery bigger than the 1800s? Howcome 1800s 3.7v is so popular?

Yes, there are 26000 series batteries of an approximate 26 mm width, versus the 18 mm width of the 18000. The size of the battery determines the capacity in amp-hours and hence in watt-hours. The technology of the battery determines the voltage output of a cell.

 

[Stosh]

Early mods used whatever size battery your enclosure would fit, as mods were mostly homebuilt. 10400 (AAA size) were used but didn't hold a usable charge very long, 14500 were popular to fit a AA battery box and a charge lasted about 1/2 a day for most. The 18650 gained popularity as a size that would "last all day" and still not be carrying a car battery around.

The 18000 batteries gained popularity for the same reason the 510 connector did, more people bought them than other styles or sizes. Back in the bad old days, when you built a mod you could use any size battery that suit your fancy. And use whatever connector fit the atty or carto you used, either 401, 801, 808, 510, 4075, Go-Go, etc...

 

[WattWick]

Is there a reason why we stopped at 3.7v? I'm just a newbie with curiosity, is there any battery bigger than the 1800s? Howcome 1800s 3.7v is so popular?

It's not we who stopped at 3.7v (which is the nominal voltage of most 4.2v batteries). It's what current/available battery technology is capable. We use various kinds of lithium batteries, and 4.2v is generally what they're capable of.

Given the bigger batteries, like 26650s, use the same lithium chemistries as the smaller ones, they still only provide 4.2v. Difference is, they can store more energy, or mAh. That's milli-amp hours..

The rate you can discharge a battery safely is tied to its size. The bigger the battery, the higher amperages you can pull without stressing them. So, at least for higher wattage vaping, a small battery would simply not be up to the task, and might malfunction. Depending on specific lithium chemistries, a malfunction can cause explosions and/or fires. This is why the IMR chemistry is recommended for vaping. IMR is considered a "safe" chemistry and will (*knock on wood*) not explode, vent hot gases or catch on fire if they are shorted or you stress them too much.

 

[sayurasem]

Ah I see now, I guess its a good thing most mod is using 18000s, 26000s would be so much thicker and awkward to hold lol...

 

[BardicDruid]

When talking batts, it helps to know what the numbers mean. With an 18650, the first two digits are the diameter - 18mm, the second two digits are the length - 65mm, and the last digit is shape - 0 cylinder.

 

[sayurasem]

When talking batts, it helps to know what the numbers mean. With an 18650, the first two digits are the diameter - 18mm, the second two digits are the length - 65mm, and the last digit is shape - 0 cylinder.

Holy crap I didn't know those specific numbers means specific things!

 

[Rule62]

The 3.7V LiMn batteries we usually use were not originally designed for e cig mods. They were, and are, industrial type batteries, used in many things, like battery packs for computers, rc cars, alarm systems, etc. Prior to e cig mods, they became popular with the high powered flashlight crowd. The early e cig mod builders found that they suited their needs, as far as output vs size.

 

[Thrasher]

is 3.7v the safest we can vape on? Just wondering even ego twist can go high as 4.8v...

also just so its clear, the battery in an ego is still a 3.7v lithium. like many VV mods there is a booster circuit to get 4.8 out of that 3.7v battery.

Holy crap I didn't know those specific numbers means specific things!

funny how that works out eh? lol