6s battery question.

[SirBudman32]

I'm thinking of trying 6s in my rigger just for a speed pass. Question is I don't have any 6s packs but I have some new 4s and 2s packs. Would it be better to use one 4s and one 2s to make 6s, or would it be better to use three 2s packs to make 6s? They are all new batteries and are all 5000's. Thanks for any help.

[Fluid]

It really makes little difference. I'd go 4+2, there will be a bit less wire used to connect the packs, so there will be a lower ripple current and very slightly more voltage.


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[SirBudman32]

Thanks Fluid, that's what I was thinking but just wanted to hear it from some one else. Thanks again.

[danielplace1962]

In reality it is exactly the same thing with the exception of the wiring as noted and you would only have to get two packs charged back up instead of three. But three identical packs like if you used the 3 2S packs can be parallel charged all at once with a single port and just crank up the amps for all three to get zapped at once. In that case it might be better going 3 X 2S. ???

[Fluid]

The charger doesn't know how the packs are configured. It only knows how many cells it is charging . There would be no difference charging 2, 3, or 4 cell packs together. Been there done that. Just be sure the packs are closely matched or some cells will be overcharged.

And don't "crank up the amps". Charge by the capacity rating, not the voltage.





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[danielplace1962]

It is usually not possible to use a parallel charge board for charging multiple batteries with different cell counts and voltages.

There is only one set of banana cables on most parallel charge boards with a single + and - from the output of the charger to the parallel board so it makes it impossible to feed the board more than one voltage setting at the same time. So the cell counts of each pack must be the same to do parallel charging.

Since your packs are now in parallel you add the capacity of all the packs together to get your charge current rate so you do crank the amps up when you parallel charge packs.

[Fluid]

The OP is not parellel charging, he is series charging. Why muddy the waters with a discussion of parallel charging?



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[danielplace1962]

Your sure a friendly fellow.

The OP was asking if there were reasons to run 3 2S pack instead of one 4S with one 2S.

So I was saying if they are all three 2S you could Parrallel charge them since they will be the same. Sorry if you can't see the relevance.

You do have to charge the batteries don't you ?

Wouldn't it make sense to be able to balance charge the multiple packs ? and be able to charge all 3 at once off a single port ? to the exact same cell voltage for all six cells.

[Fluid]

Sadly I predicted this would likely devolve into a personal attack if I dared to challenged the poster. Sure, why shouldn't the OP buy a brand new charger or more accessories to be able to do the same thing he can do with his current setup? I series charge all the time and very seldom parallel charge. It is just simpler to series charge (with balancers attached if you feel the need to balance every time you charge). Bye forever.....


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[SirBudman32]

Wow, didn't mean to start a fight with this. Fluid, you have given me good advise in the past and with this as well. As for charging I never really asked about it. I have the Turnigy Mega 200Wx2 and I also have para boards and series boards. So in that aspect I can para/ series charge at the same time but I don't.
Fluid, Thanks again for the advise on RUNNING a 6s battery. What you said is what I thought, I just want to hear it from someone else to make sure.

[danielplace1962]

So I started discussing something you weren't directly asking about. To me the charging process was relevant to the packs configuration for me.
Just thought it was relevant to the pack configuration and how I would prefer to do them and why. Pack configuration is what you asked about. If you were only looking for one opinion, the one coming from your buddy you should have said so. Lol.
I just prefer parallel charging multiple packs versus series charging and they need to be the same voltage.

Best of luck.

http://www.rchelicopterfun.com/parallel-lipo-charging.html

https://sites.google.com/site/tjinguytech/charging-how-tos/parallel-charging