18650 Batteries

[J.D. Merchant]

Been vaping for almost a year, off of stinkies for 10 months. I've learned quite alot from You Tube and FB groups, I follow everything Mooch suggests on battery safety.
I am aware of marrying my batteries together for my dual and triple cell mods. My questions: As long as the stay a set can they be used in different mods? If I switch them between series and parallel mods does reversing the polarity on a cell effect the batteries? Last does a married set have to always be put back in the same postion in the sled. Thanks for sharing your info.

 

[Clark Kent]

I keep My married sets together, If its a 2 battery mod, I will use them in any two battery mod same for my 3 battery sets, as for the same positiom, I will try to rotate 1-2, 2-1, or 1-2-3, 2-3-1, 3-1-2, and so on, so they seem to balance out with charges and discharges, now I kind of try to keep the same mod with the same sets as far as make as I own a few of each so rx200's stay with Rx200's and same with some of the 2 battery mods that require a higher amp battery thab 20A. I did not catch the series or parallel question, but I would try to keep those sets seperate too.

 

[VHRB2014]

From what Iv read, you can use them in whatever mod you have that takes the same married set configuration. I have one parallel and one VW mod (they wind up being stacked) and swap three battery sets between the two, when ever needed. I read that doing this between parallel and stacked might actually add another level of equilibrium to them.

Now as far as what goes where and at what time and in what position and then keeping track of ALL THAT! Naw, that`s too much, LOL.

What I find I fixate on the most doing this, is when I pull them out and put the on the charger, I like to see that they are within a couple of points of each other (ex. 3.65v & 3.62v). As long as I`m seeing this, it means to me they are being discharged pretty equally and that`s what important.

BOL.

 

[retired1]

Moved to Batteries and Chargers

 

[Mooch]

Batteries are married to each other, not the mod. Use them wherever you want, in any mod, as long as they stay married.

No need to rotate unless your mod has a defective voltage sensing circuit for one of the batteries and discharges it a little bit continuously.

 

[DaveP]

Batteries are married to each other, not the mod. Use them wherever you want, in any mod, as long as they stay married.

No need to rotate unless your mod has a defective voltage sensing circuit for one of the batteries and discharges it a little bit continuously.

I wonder about the Wismec Rx200S. It has the ability to display the voltage of all three batteries individually, so it has isolated access to the connection points. It also needs battery power to turn on with 5 clicks when it's off. The center battery always reads a half a tenth lower than the rest if you check it mid battery cycle, so that must be the one that it uses for power to monitor button presses when it's off. I randomly insert the three batteries in the sled each time I change.

Most recent mods are like that. They save the cost of a power switch and use the electronics with a latch circuit for power on/off sensing.

 

[Mooch]

I wonder about the Wismec Rx200S. It has the ability to display the voltage of all three batteries individually, so it has isolated access to the connection points. It also needs battery power to turn on with 5 clicks when it's off. The center battery always reads a half a tenth lower than the rest if you check it mid battery cycle, so that must be the one that it uses for power to monitor button presses when it's off. I randomly insert the three batteries in the sled each time I change.

Most recent mods are like that. They save the cost of a power switch and use the electronics with a latch circuit for power on/off sensing.

My RX200 always reads the lowest voltage battery the lowest though. I think it's random, based just on component tolerances as it's always off in every RX-series device.

If it was just the middle battery then there would be huge voltage isolation issues as the board would be at 4.2V for its ground and 8.4V for its positive. This would cause short circuits to the lowest voltage battery unless expensive isolators were used. If it was both the bottom and middle battery, at 0V and 8.4V for the two terminals, that wouldn't cause any isolation issues but would drain the bottom and middle battery equally.

Odds are it's all three batteries being used by the board to power its button-sensing circuitry, if designed properly.

 

[DaveP]

My RX200 always reads the lowest voltage battery the lowest though. I think it's random, based just on component tolerances as it's always off in every RX-series device.

If it was just the middle battery then there would be huge voltage isolation issues as the board would be at 4.2V for its ground and 8.4V for its positive. This would cause short circuits to the lowest voltage battery unless expensive isolators were used. If it was both the bottom and middle battery, at 0V and 8.4V for the two terminals, that wouldn't cause any isolation issues but would drain the bottom and middle battery equally.

Odds are it's all three batteries being used by the board to power its button-sensing circuitry, if designed properly.

That makes sense. Why use one cell when you have the cumulative voltage of all three and can come off a voltage regulator on the board to get the voltage you need in that part of the circuit?

It's always been a mystery to me. When I do the battery display check, it's always the middle battery in my RX200S that lowest by as much as half a tenth or so. When I pull them out and check them with a meter they are always almost exactly same within a few hundreths. But, they do have the ability to read each cell individually, so there's access.

One of my triple sets is on the charger right now. I tested the other (charged) set and got 4.16, 4.16, and 4.17. Those have been in their case for a month or more since I've been using other mods lately.