Battery help (Dual series 18650)

[JustaGam3]

Not sure if I should be posting this here but since I have less than 10 posts figured I should....Anyway in the next couple days I'm picking up a dual series 18650 box mod. I recently purchased 4 Samsung INR18650-25R 2500 since I was told to keep the batteries in pairs when used. The Samsung batteries are better than the current 18650 batteries I own for a normal tube mod. I'm wondering if I can try the Samsung batteries out before I pick up the box with my tube mod or should I just wait and only use these 4 batteries with the box mod I pick up? Thanks ahead for the help.

Just want to know if it will affect safety and performance if used before I use for the box mod...

 

[Susan~S]

I'm no expert (I've never used a dual box mod) but from what I remember reading:

1. Keep in pairs, use in pairs, charge in pairs (don't use until you get your dual box mod)
2. Mark them A, B, C, D etc.
3. Rotate them on the charger (i.e. 1st time -- A goes in slot 1, B goes in slot 2; 2nd time -- A goes in slot 2, B goes in slot 1
4. Rotate their position in your box mod?? Can't remember if I also read this.

Hopefully someone can chime in and educate both of us.

 

[JustaGam3]

I'm no expert (I've never used a dual box mod) but from what I remember reading:

1. Keep in pairs, use in pairs, charge in pairs (don't use until you get your dual box mod)
2. Mark them A, B, C, D etc.
3. Rotate them on the charger (i.e. 1st time -- A goes in slot 1, B goes in slot 2; 2nd time -- A goes in slot 2, B goes in slot 1
4. Rotate their position in your box mod?? Can't remember if I also read this.

Hopefully someone can chime in and educate both of us.

Thanks....I read all this also...Just wasn't sure if using them before hand and making sure they are fully charge and then pairing them mattered, but I might just play it safe and wait till I get the box

 

[Kaezziel]

That's pretty much spot-on, Susan!

That being said, I do not see the point in a dual, in series, box mod.... asking for trouble, IMHO... I am truly hoping that it is a regulated box mod and not a mechanical box mod.............

 

[JustaGam3]

That's pretty much spot-on, Susan!

That being said, I do not see the point in a dual, in series, box mod.... asking for trouble, IMHO... I am truly hoping that it is a regulated box mod and not a mechanical box mod.............

It's semi regulated....An owner of a nearby vape shop builds them and he let me try the same build on a dual parallel and dual series and I preferred the series better.

 

[Kaezziel]

Not sure what "semi-regulated" means... either it has a chip and is regulated, or it's running straight off the batteries...
Series will give you higher voltage, parallel will give you longer life... higher voltage also means higher amp draw... batteries in series retain the same amp rating as if using one battery (for example, the Sony VTC4 is a 30A battery... that will remain true if they are wired in series at 8.4v, you will top out at 30A on the current draw with a 0.28 ohm coil) In comparison, with one battery at 4.2v, you top out with a .12 ohm coil...

Basically, I'm just saying to be careful, pay attention to your setup, and use an Ohm's Law calculator to make sure that you are staying within safe operating parameters....

 

[amtseung]

If you intend to use them in pairs, keep them in pairs. That way they'll always drain and charge together, and wear out together. easier to keep track of that way. You don't have to do this, but it's generally good practice if you have enough batteries to begin designating them to specific tasks. I don't, and I have two tube mech mods and a diy 3-battery box mod, and I only have 3 batteries. I find that more useful than labelling batteries by which ones you charge/discharge together is writing the date you first charged your battery on the battery itself, or using the number/letter/name designations and making a separate chart. This way, you'll know when you're nearing the end of that 200-300 charge cycle lifespan.
Oh, and since Sony doesn't make these batteries anymore, and they're better than all the rest by a pretty wide margin, pick some up before the world's stock disappears.

Hope this helps.

 

[Warpigs]

Welcome to ECF! When it comes to batteries, be safe. Vape on!

 

[monkey39]

I'm no expert (I've never used a dual box mod) but from what I remember reading:

1. Keep in pairs, use in pairs, charge in pairs (don't use until you get your dual box mod)
2. Mark them A, B, C, D etc.
3. Rotate them on the charger (i.e. 1st time -- A goes in slot 1, B goes in slot 2; 2nd time -- A goes in slot 2, B goes in slot 1
4. Rotate their position in your box mod?? Can't remember if I also read this.

Hopefully someone can chime in and educate both of us.

3. Rotate them on the charger (i.e. 1st time -- A goes in slot 1, B goes in slot 2; 2nd time -- A goes in slot 2, B goes in slot 1 Not sure if this is necessary - in an intelligent charger, shouldn't make any difference what slot you charge in, should it? If I'm wrong, someone please correct me. In any case, don't think it could hurt

4. Rotate their position in your box mod?? Can't remember if I also read this. Yes, rotate position in your box mod. In a series box mod, from what I understand, the batteries will drain unevenly

 

[Fictitious Character]

I find that more useful than labelling batteries by which ones you charge/discharge together is writing the date you first charged your battery on the battery itself,

This is what I have been doing as well. Not only does it keep my pairs together but I will have a better idea on how long they actually lasted.

 

[rusirius]

Not sure what "semi-regulated" means... either it has a chip and is regulated, or it's running straight off the batteries...
Series will give you higher voltage, parallel will give you longer life... higher voltage also means higher amp draw... batteries in series retain the same amp rating as if using one battery (for example, the Sony VTC4 is a 30A battery... that will remain true if they are wired in series at 8.4v, you will top out at 30A on the current draw with a 0.28 ohm coil) In comparison, with one battery at 4.2v, you top out with a .12 ohm coil...

Basically, I'm just saying to be careful, pay attention to your setup, and use an Ohm's Law calculator to make sure that you are staying within safe operating parameters....

If it's what I think it is, "semi-mechanical" would be a better term. Generally these are basically mechanical mods with a MOSFET wired in in place of a switch. The idea being you don't need a ridiculous big honking switch to handle all the DC current since you can just switch it with the FET.

And it's true that batteries in series will retain the same amp limit, but remember with double the voltage your amp draw will be cut in half. i.e. running a build that draws 10amps at 4.2 volts will only draw 5amps at 8.4 volts. So honestly it's kinda a wash...

Overall batteries in series require more maintenance to be safe, but honestly in terms of safety there isn't a whole lot of trade off in my opinion. At least as long as you understand what the limitations of either setup are.

 

[Kaezziel]

If it's what I think it is, "semi-mechanical" would be a better term. Generally these are basically mechanical mods with a MOSFET wired in in place of a switch. The idea being you don't need a ridiculous big honking switch to handle all the DC current since you can just switch it with the FET.

And it's true that batteries in series will retain the same amp limit, but remember with double the voltage your amp draw will be cut in half. i.e. running a build that draws 10amps at 4.2 volts will only draw 5amps at 8.4 volts. So honestly it's kinda a wash...

Overall batteries in series require more maintenance to be safe, but honestly in terms of safety there isn't a whole lot of trade off in my opinion. At least as long as you understand what the limitations of either setup are.

It may be "morning foggy brain", but my understanding is that this is true of parallel builds, not serial...

Thanks for the explanation on the "semi-mechanical/semi-regulated" though... makes sense for what it is... doesn't really regulate anything, per se

 

[rusirius]

It may be "morning foggy brain", but my understanding is that this is true of parallel builds, not serial...

Thanks for the explanation on the "semi-mechanical/semi-regulated" though... makes sense for what it is... doesn't really regulate anything, per se

Actually it was my poor wording that resulted in your confusion, not your morning foggy brain...

I used the term "build" which kinda implies a given coil at a given resistance... bad choice of words... What I should have said was "running a build OF THE SAME POWER that draws....." In other words, at 4.2 volts a .88 ohm coil will generate 20 watts drawing 4.76 amps... On the other hand, if we double the voltage to 8.4 volts, we need a 3.53 ohm coil which only draws 2.38 amps to generate that same 20 watts of power.

i.e. we can generate the same amount of power using less current with higher voltage... so when we're talking about a non-regulated (on in this case a semi-mechanical mod) with the bats in series we use less current to generate the same power levels because our resistance will be higher for those given power levels.

I think I just put myself in a fog with that one... LMFAO

 

[Kaezziel]

LOL... thanks for clearing that up, bro!
By the way, awesome job on your vv-vw thread! I actually referenced to it in another thread here in the new members forum... guy is having issues trying to run a .3 ohm build on a DNA 30 Hana clone.