Battery Suitability

jonski

How can you tell if your battery is suitable for sub-ohming ?

Do you have to buy a specific type of 18650 ?

8mm

You need a battery with capability of high current draw for sub ohm.

This is what I use:

Samsung INR18650-25R 3.6V 2500mAh Rechargeable Li-Ion Battery
35A peak discharge / 22A continuous discharge

Celly Smunt

It depends on how low you plan to go really, if you're going to be hovering around 0.3 to 0.5, anything over 20A (20amps) should be fine.

The lower you go with your ohms, the higher you should go with your amp rating on the battery. Note though that some cheap batteries like the old purple efest (are they even still for sale?) Have been reported to have a bit of dodgy current rating from battery to battery, stick with the likes of samsungs,AW etc etc, don't cheap out.


Or even better get a 28650 device and never worry about that stuff again.

sangsung

Celly Smunt wrote: »

It depends on how low you plan to go really, if you're going to be hovering around 0.3 to 0.5, anything over 20A (20amps) should be fine.

I'm using a 0.16ohm coil on an istick. Is that OK? Will it explode in my face? I'm vapping at 11watts.

8mm

sangsung wrote: »

I'm using a 0.16ohm coil on an istick. Is that OK? Will it explode in my face? I'm vapping at 11watts.

Your drawing around 8.3 amps so shouldn't be a problem.

And I'd imagine your istick is designed to calc if your out of range and not fire.

volt = sqrt ( watt * ohm)

amp = watt / volt

Penny Tration

sangsung wrote: »

I'm using a 0.16ohm coil on an istick. Is that OK? Will it explode in my face? I'm vapping at 11watts.

I assume you mean a 1.6 coil (not 0.16) if it's ay 11 watts? Either way you'll be fine, isticks are regulated so basically just wont work if your coil is too low resistance.

Jonski, the easiest way to figure out what's suitable is to follow ohm's law to calculate the required amperage, then get a battery with that amperage or higher.

Check out NewAmsterdamVape on youtube for easy to understand ohm's law and battery safety videos

jonski

Thanks for all the answers people . One of my concerns, and I should have said so in my original post, was the suitability of the 18650 batteries that I already have at home . Two of the batteries are just green with a white taped on sticker saying 18650 2100mAh 3.7V and 18650 2500 mAh 3.7V, nothing else, although one came with the eVic vtc mini . Of the other two batteries one is a purple efest 2500mAh IMR 18650 3.7V Li-MN 35A High Drain , the other is green with a black stripe on top NCR 18650A and then a white sticker saying 18650 3100mAh 3.7V .

8mm

My understanding is that you won't find a high drain 18650 over 2500mAh.

Your efest says 35A high drain so I'd trust that.

The one that came with your eVic should be a high drain given that's the way that device is used.

Fratton Fred

Celly Smunt wrote: »

Note though that some cheap batteries like the old purple efest (are they even still for sale?) Have been reported to have a bit of dodgy current rating.

I use nothing but purple efest 3100mah and have never had a problem.

Grougy

jonski wrote: »

Thanks for all the answers people . One of my concerns, and I should have said so in my original post, was the suitability of the 18650 batteries that I already have at home . Two of the batteries are just green with a white taped on sticker saying 18650 2100mAh 3.7V and 18650 2500 mAh 3.7V, nothing else, although one came with the eVic vtc mini . Of the other two batteries one is a purple efest 2500mAh IMR 18650 3.7V Li-MN 35A High Drain , the other is green with a black stripe on top NCR 18650A and then a white sticker saying 18650 3100mAh 3.7V .

I think you talking about Sony VTC4 "18650 2100mAh 3.7V" if you take the white sticker off then you will see the full spec.

The second look`s like VTC5 but shouldby 2500mAh (again under the white scticker shouldby more info)

And the last one is a Efest High Drain (check Efest website)

jonski

Thanks again for the extra input folks .

I see PBusardo raving about LG Brown HG2 INR18650 3000mah 18650 : LGDBHG21865 , saying they are a great battery .......ESmokeIreland seem to have ones that look very similar , I will throw in an order tonight to try them .

Celly Smunt

Fratton Fred wrote: »

I use nothing but purple efest 3100mah and have never had a problem.

I use them myself too but that's because I know my own batteries at this stage, nipple top can be a bit of a pain thoygh. But yeah, most likely grand and no bother, but they can vary from battery to battery.

TinCool

What you need is a 400W battery.

https://www.youtube.com/watch?v=cill_IbtXiw