Married 18650's

[Silverrado58]

I totally understand the concept of keeping dual 18650's together and never breaking them apart. My question is. Would it be safe to use them in another dual 18650 mod?
I don't mean constantly switching them back and forth. This would be a hypothetical situation, such as in you used them for awhile in one mod, then it bites the dust, and you buy another dual 18650 mod to replace the one that bit the dust. My first thoughts would be yes, it is safe, cause your not separating the two batteries, but i could be wrong and missing something. Any enlightenment would be appreciated.
Also I have 2 separate chargers, one is a 2 bay made by joyetech, the other is a Nitecore 4 bay, on both chargers the bays charge independent of each other. I always keep my dual batteries married. Any thoughts on using 2 different chargers?

 

[ChelsB]

Thank you for creating this thread, I have the same question [emoji4]


Sent from my iPhone using Tapatalk

 

[Rossum]

We've just been through this in another thread.

Batteries are married to each other, not to a particular mod, nor to a particular charger. There is no problem using a married pair together in a different dual-battery mod. There's also no problem using a different charger to charge the married pair, just keep them together. If your charger supports different charge currents in different bays, I would make sure both bays set to the same charge current.

 

[Silverrado58]

I didn't think it would be a problem, l just wanted verification on my thoughts. Thank you Sir,.
My chargers don't let me choose my charging rate it's based on how many batteries I'm charging at one time, everything's done automatically

We've just been through this in another thread.

Batteries are married to each other, not to a particular mod, nor to a particular charger. There is no problem using a married pair together in a different dual-battery mod. There's also no problem using a different charger to charge the married pair, just keep them together. If your charger supports different charge currents in different bays, I would make sure both bays set to the same charge current.

 

[aLyr]

When it comes to chargers, I have chosen only those which can be directly connected to mains (110..230V AC) or to a car socket 12V, alternatively.
Those needing a USB connector, be it a wall plug USB power supply or a car USB adapter, were out of any question.

Thus, I started off with a Nitecore D2 2-bay charger.
Pro: It has a digital display showing charge time, cell voltage, and charge current in turn on both bays, the display changing each second. A nice feature.
Con: The charge current is 0.5A only, so it takes many hours to charge high capacity cells 2.5Ah and above (5..7h).

My next charger became a Nitecore SC2 2-bay.
Pro: It is able to charge cells at 0.5A, 1A, 2A, and 3A, but the latter in one bay only. Typically, it chooses 2A for all my cells (2.5Ah or higher) by default. But I am able to override this auto-selection. Charge times have become very much shorter since using this device.
Con: There is only a display of 4 row, 2 column LEDs on each bay. While charging, one of the voltage LEDs will blink, which stops when charging has finished.
The LED labels are not printed or engraved on the display screen, they rather chose to use a transparent sticker with print on it, which will go off very soon.

I have two married pairs of 18650 cells, Samsung 30Q and 35E.
After use in my Vaporesso Tarot Pro, and leaving them alone for 30min, they showed a difference of up to 20mV of resting voltages.
However, while charging them at 2A in my SC2 simultaneously, they were always less than 60sec apart when charging had finished.
It seems to me that they are married quite happily.

Best regards,
aLyr

 

[Silverrado58]

Not sure how true this is, but i read somewhere that charging batteries at the higher rates shortens the overall life span of the batteries. Both of my chargers, charge not higher than 0.75ma i have a Nitecore I4 (4 bay) and the other one is a 2 bay by Joyetech. The Joyetech can only be charged in the in the house. The Nitecore can charge in the house or the car, had to buy a separate charger cable for the car. No adapters or usb needed for either chargers. What's nice about the Nitecore is that it will charge other batteries, not just 18650's it will charge 26650, AAA, AA, C. It will not charge D size those are too big for the bays.

 

[aLyr]

You're kidding, right?

I do not know any charger which can supply 0.75mA only. It would take days for charging a cell with a current as low as this.
Did you mean 0.75A instead?

And yes, for Nitecore chargers, you will have to buy a cable for use in a car seperately, just as I had to.

And yes again, my two Nitecore chargers are also able to charge NiCd and NiMH cells. But this does not apply in any way to the LiIon cells used in e-cigarettes, right?

Regards,
aLyr

 

[Silverrado58]

You are absolutely right. I guess I was thinking in terms of 750 milliamps which would translate into 0.75 Amps. I've been a little scatterbrained these days. No i was mainly referring to the attributes of the Nitecore charger. My Joyetech charger only does 18650 batteries. I don't even think it will do 26650's. The only batteries i use for vaping is 18650.

 

[Silverrado58]

Front and back of Joyetech charger.

 

[aLyr]

If this is the case, get yourself a Nitecore SC2.
It takes LiIon cells up to 26-65-0 (writing the size in this way for a reason).
Of course, it will take 18-65-0 cells also, as well as smaller NiCd and NiMH cells, though this not an issue in this forum.

And please do not call cells "batteries"; they aren't!
Batteries are combinations of two or more cells.

Regards,
aLyr

 

[Silverrado58]

Naw I'm good on chargers for now. Speed charging is not a big issue with me. I have many married cells. Excuse my layman term of calling them batteries. As a matter of fact i just read a article on batteries and cells not to long ago and the same thing was said in the article. Sometimes old habits die hard, especially when you live in a world of layman people. If i told most people I'm ordering some cells they would ask me WHAT??? If told them batteries. They would know what im talking about. So i like to keep it simple.

 

[aLyr]

Moenie worry nie, as people in South Africa would say.

I know that many people do not understand the difference between cells and batteries.

But just look at your car. It typically has a 12V nominal lead-acid battery composed of 6 cells at 2.1V each.

And even if there are mods around with 2, 3 or even 4 cells, I'd never call those cell setups batteries.

 

[BackDoc]

A battery is defined as one or more cells.....So yes, a single cell is accurately called a battery

 

[aLyr]

You write that a battery is defined as one or more cells,
which is not true!
Claiming that a single cell can be called a battery?
Never, ever!
I'm afraid that you've been very mislead.

Best Regards,
aLyr
MSEE + MSCS

 

[Rossum]

You write that a battery is defined as one or more cells,
which is not true!
Claiming that a single cell can be called a battery?
Never, ever!
I'm afraid that you've been very mislead.

Best Regards,
aLyr
MSEE + MSCS

If you truly believe that, maybe you should take it up with the folks who edit and maintain Wikipedia.

An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, smartphones, and electric cars.
Battery (electricity) - Wikipedia

 

[Hawise]

Not sure how true this is, but i read somewhere that charging batteries at the higher rates shortens the overall life span of the batteries.

This is partly true. The real issue is how much they heat up at a given rate. If they get slightly warm you're OK, but if they get very warm or hot, you're losing lifespan. The 18650s we use for vaping are usually good at 1A, but 2A can be a problem depending on the cells and the charger. At .75A you shouldn't have any problems.

 

[DaveP]

The term battery has become a generic term for cells and batteries. Even the dedicated battery sellers advertise them as a battery, not a cell. I've learned to live with it.

I agree that married batteries go everywhere with each other and are never separated. If they get used singly or with other batteries, then they are technically divorced and should never be married again. It's OK to split them up, but not remarry them.

 

[BackDoc]

You write that a battery is defined as one or more cells,
which is not true!
Claiming that a single cell can be called a battery?
Never, ever!
I'm afraid that you've been very mislead.

Best Regards,
aLyr
MSEE + MSCS

does it really matter?