Mech Mod - Batteries, 3.2v?, discharged?

[otiose]

Dear Sifu,

A VV device like the vamo, the device would probably stop firing when the battery drops to 3.2v
In regards to a mech mod, does it stop firing at 3.2v also ? If yes, is this due to a 'protection system designed in a battery' or 'below 3.2v is like zero power in layman terms'.
I am wondering this, because I tend to see people warning not to over discharge the battery. Some even says not to use the battery when it is below 3.6v - and thus, the use of a multi-meter.

Thanks again.

 

[Ec!g]

A VV device like the Vamo is regulated through a built in circuit to protect the cell from over discharge. The reason it stops around 3.2V is that there is a drop in voltage under load so even if the cell reads say 3.2 out of the device, while in use that number will be much lower.

A mechanical mod provides the quickest and shortest way for voltage to travel. No circuitry, no protection and most of the time not even wires. The only way to protect the cell inside a mech is through a pcb protection board added to the cell. That however is not always enough. Knowing the discharge rate of said cell and working within the recommended parameters is the best way to keep things safe.

 

[gully]

Over discharging will shorten the overall life of the battery.

 

[otiose]

so, ... I still dont get it. Maybe I am a bit slow... but:-

In regards to a mech mod, does it stop firing at 3.2v +/- ?

 

[Technonut]

so, ... I still dont get it. Maybe I am a bit slow... but:-

In regards to a mech mod, does it stop firing at 3.2v +/- ?

IMR batteries have no low voltage protection.. You could very well run them down below 3.2v in a mech mod, and ruin them. I'm sure you will notice the drop-off in your vape and pull it before that happens though...

 

[Ec!g]

so, ... I still dont get it. Maybe I am a bit slow... but:-

In regards to a mech mod, does it stop firing at 3.2v +/- ?

Not trying to put you down, but for your safety and for the ones around you, I strongly urge you to familiarize yourself with the dos and donts of Li-ion's before using them in mechanical mods as they can be lethal if improperly handled.
You don't want to hold a potential pipe bomb to your lips without knowing the risks and doing the best you can to prevent them.
Batteryuniversity.com has all the info to get you started and I recommend you use it.

To answer your question in short, NO.
It'll stop when the cell has been fully depleted.

 

[Technonut]

Not trying to put you down, but for your safety and for the ones around you, I strongly urge you to familiarize yourself with the dos and donts of Li-ion's before using them in mechanical mods as they can be lethal if improperly handled.
You don't want to hold a potential pipe bomb to your lips without knowing the risks and doing the best you can to prevent them.
Batteryuniversity.com has all the info to get you started and I recommend you use it.

To answer your question in short, NO.
It'll stop when the cell has been fully depleted.

Agreed... I also agree with PBusardo's rant regarding this sub-ohm vaping craze. There have already been widely published incidents involving exploding batteries during vaping in the past. All we need are a few more fools who do not even have a way of checking resistance on their coils, and buy the cheapest batts they can find on e-bay for sub-ohm vaping have their PV blow up in their face. This will give the government and public all the ammo they need to pass strict regulations against vaping.

 

[Fury83]

Short version

No, a mech will not stop until the battery itself does (completely discharge)
Yes, this would be bad for your battery
Yes, you would likely notice the drop well before 3.2 volts
Yes, you should own at least a cheap multimeter
Yes, a good charger is also necessary, an xtar vp1 also will show you the voltage of your batts but any charger with a decent algorithm that cuts off properly will work.

 

[Racehorse]

A useful topic, Rolygate has a lot of good information to share. There seems to be quite a lot of misinformation about battery safety.

http://www.e-cigarette-forum.com/forum/battery-issues/254690-protected-batteries-vs-imr-safety.html

 

[otiose]

Thanks all. I have been reading more on battery. It seems that everytime I think I have know it all there is something else to learn. HAHA.

Anyhow, based quick check in google, AW IMR 18650 battery has lowest discharge rate of 2.5v but from experience around 3.6v the performance kinda taper off and I do find this slightly weird. For example:-

AW IMR 18650

Set A: Mech + Dripper RBA @ 0.8ohm (28ga wire)
Set B: VW + standard Carto Tank @ 2ohm

Fresh battery (4.2v) on Set A is awesome until the battery runs down to about 3.6v. This is where in my setup performance kinda sux.
I take this same battery (now at 3.6v) and put in on my Set B. Even setting it at 3.2v, the performance is still acceptable.

Am I missing something here? Is this due to the gauge of the wire in Set A which required much more watt to have a good performance given that it is a thicker wire (Having said this, 3.6v on 0.8ohm 28 gauge is still 16watt).

 

[gully]

Set B is giving you regulated power,the chip inside will keep giving you the power you have set until the battery needs to be charged.

Set A is just using whatever the battery can deliver,the power goes down as the battery drains.

The difference between A and B is the chip in B.

I urge you to reconsider using a .8 coil until you are confident that you know exactly what you are doing,there are possible dangers to that setup.

Once my batteries reach 3.6v I charge them.

Here's some good reading,

http://www.e-cigarette-forum.com/forum/ecf-library/129569-rechargeable-batteries.html

 

[otiose]

Set B is giving you regulated power,the chip inside will keep giving you the power you have set until the battery needs to be charged.

Set A is just using whatever the battery can deliver,the power goes down as the battery drains.

The difference between A and B is the chip in B.

I urge you to reconsider using a .8 coil until you are confident that you know exactly what you are doing,there are possible dangers to that setup.

Once my batteries reach 3.6v I charge them.

Here's some good reading,

http://www.e-cigarette-forum.com/forum/ecf-library/129569-rechargeable-batteries.html

Thanks Gully.

But, notwithstanding the chip and Set B being regulated, the performance at 3.6v in a Mech is weak vs the same battery drain to 3.6v set at 3.2v in Set B. This is the part that I cant understand ???

Thanks again for the concern using sub-ohm. Really appreciate it. I always check the coil after rebuilding before using it to check for shorts and once it drop to about 3.7v the performance is pretty noticeable to me so draining it to low level doesn't seems to be possible case for me. Anything else to be on the look out for ?

 

[ebhomepc]

I think the issue is the vv mod regulates to what volt you set so if you have a vv set at 3.3v and your batts has 3.6v you will get 3.3v but with a mech if you have 3.6v its unregulated and you have to take into account the voltage drop your mech has so you have 3.6v in your mech but the mech has internal resistance so let's say you loose .6v due to the mechs resistance you will only be vaping @ 3v.

That's the reason your getting a better vape using a vv @ 3.2v.

EDIT: also in my short amount of experience you don't have to worry about your battery discharging to low as you said the vape is unusable before your battery discharges below a safe voltage. The only issue you could have is if your button was getting pressed say in your pocket then it could discharge without you knowing.

If I'm wrong some one correct me.

Sent from my Nexus 4 using Tapatalk 2

 

[otiose]

I think the issue is the vv mod regulates to what volt you set so if you have a vv set at 3.3v and your batts has 3.6v you will get 3.3v but with a mech if you have 3.6v its unregulated and you have to take into account the voltage drop your mech has so you have 3.6v in your mech but the mech has internal resistance so let's say you loose .6v due to the mechs resistance you will only be vaping @ 3v.

That's the reason your getting a better vape using a vv @ 3.2v.

EDIT: also in my short amount of experience you don't have to worry about your battery discharging to low as you said the vape is unusable before your battery discharges below a safe voltage. The only issue you could have is if your button was getting pressed say in your pocket then it could discharge without you knowing.

If I'm wrong some one correct me.

Sent from my Nexus 4 using Tapatalk 2

Sounds very plausible, which would mean that a fresh battery at 4.2 is actually a 3.6v in your example. Time to read up about how to check voltage drop in my mech mod.

 

[ebhomepc]

Yes that's right

Sent from my Nexus 4 using Tapatalk 2

 

[gimmieshelter31]

Your vw unit in set b has a boost circuit that set a does not.

 

[Heavyrocker]

I think the biggest saftey concern with Mechs are if you leave the firing button on.If you use the IMR safe chemistry batts, it will vent hot gas,but if you use a ''protected'' batt in the Mech it will just trip the circut in the batt and shut down with out any problems...BUT and this is a big BUT..if the ''protected'' batts do have a malfunction in their circurty is faulty,you will have bigger problem,it will explode ,with flames,this is why IMR batts are perferred in Mechs.