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Battery Recomendations Please
(09-28-2015, 06:12 PM)Llama Wrote:  Sorry it's a long post, but battery safety is not a simple subject, and is quite important to understand imo.

(09-28-2015, 02:16 PM)Smok_King Wrote:  This only happens with the old mech mod.
The devices we have now especially the Joyetech VTC are so advanced, accidents like that are pretty much gone.

While it's true that nowaday's regulated mods have safety features that makes them safer than unregulated mods, they don't know the battery's max discharge rate so can draw too much from it, which can lead to battery damage, venting, or even fire or explosion of the battery if it's not using a safe chemistry.

(09-28-2015, 02:16 PM)Smok_King Wrote:  All the important information is display on the OLED screen. Amps meter is there to tell you if you need to change battery.

You can check this post I made about my opinion on the current display that's been added on the most recent firmware:
It's a bit technical, but understanding regulated mods requires a bit of knowledge.

(09-28-2015, 02:16 PM)Smok_King Wrote:  Thanks to Joyetech, I feel safe using any batteries. Just make sure you stick to the limits.

I really mean no offense as you seem to be a really nice person, but you're not doing Joyetech any good by blindingly trusting them instead of researching and understanding the science behind batteries and regulated mods before giving advices. Why do you think most people recommend Sony VTC4 and Samsung 25R? It's because they have a high discharge rate, and a safer chemistry that makes them just heat and release gas when venting, instead of risking to cause hazards like fire or explosion. Now you can often get away with lower spec batteries as they usually can handle more in pulses than in continuous (pulse means for a short duration), but it will probably reduce the battery's life, and is not as safe as staying under the continuous rating.

(09-28-2015, 02:16 PM)Smok_King Wrote:  230°C @ 30W you are only pulling 6A. That's under 10A.

Thoses numbers you're posting are for a Voltage of 5V and a resistance of around 0.83ohms, so they describe the current on the atomizer's side of the chipset as batteries we use in the VTC have a voltage of 4.2V at maximum charge.

To know the current actually drained from the battery you need to use ohm's laws (a good online calc: ) using the Power output and the battery's voltage (which you can see when long pressing fire and - buttons when the VTC is turned off). Just to be on the safe side it's better to use the minimum voltage before the device cuts power and considers the battery as discharged. If I recall correctly the VTC Mini cuts the power when the battery's voltage is under 3.2V. So using that ohm's law calculator for 30W at 3.2V we see that the current drained is 9.375A. It is still under 10A, but you can see there's less margin so it could become problematic if the person wants to check how it vapes at 40W for example (12.5A).

To be safer it's always better to use the maximum power the device can output, with the lowest voltage the battery can be before the device cuts power. In the VTC's case, using 60W and 3.2V we get a max current of 18.75A, that's why I advise the LG HG2 which has a max continuous discharge current of 20A.

If you really want to be safe, it's usually not a bad idea to use Sony VTC4 (30A) or Samsung 25R (25A). People keep recommending these for a reason.

Don't forget the 10%, 75w/3.2v=22A/0.9=26A mod displays Amps going from chipset to tank not Amps of the battery so you can't "trust the display" it's not displaying actual amps being used by the battery. All other ohm laws are for mech mods only. I wouldn't go over 60w with 20A batteries. Samsung 25R and 25R5 are only 20A CDR.

(11-07-2015, 11:14 PM)VapesAhoy Wrote:  So what single 18650 batteries are capable of working safely in Power mode up to the  max VTC Mini power output of 75W?

Only 30A batteries, 20A batteries will cut off after about 20 puffs and display weak battery. Although the 30A batteries have much less mAh they will actually run much longer then 20A 3000mAh batteries because of this.


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