Twin adaptors

[Sqwidge]

I have just received one of these but the enclosed instructions are about as clear as mud so once again I am relying on the seasoned members of this fabulous forum.
This device enables me to charge 2x 3s lipo together using the 6s balance port which I get fine however I assumed as they are 11.1v lipo's that this would be the normal program I would pick on my charger but when I try to select it it says over voltage, then I twig that using the 6s port I have to charge it as a 6s battery but will charging 2 11.1v lipo's at 22.2v damage them? I also usually charge at 1.5a would I have to double this also?
What happens if one is slightly higher on voltage than the other? will the lower of the 2 continue to charge after the first is full? and will it be charged at 22.2v?

[Grant85]

What do you mean you usually charge at 1.5A this is if you are charging a 1500mah lipo i thought.Might be wrong though.I thought you just charge at 1c which is 1x the lipo packs capacity.For example if your charging a 2200mah pack you would charge at 2.2A and double if your doing two packs.Maybe somebody else will explain a little better.

[Sqwidge]

Your right bud but I was told slower you charge the more cycles you get, whether this is true or not I dont know but have been doing it since I was a beginner lol, but assuming we do it at what it should be to charge 2 lipo I would be doing it at 22.2v and 4.4a, can anyone confirm this is correct?

[Grant85]

Your right bud but I was told slower you charge the more cycles you get, whether this is true or not I dont know but have been doing it since I was a beginner lol

But surely if your charging say for examples sake;a 1800mah lipo on a 1.5A cycle then it won't put back in the lipos full capacity eg only 1500mah max go back in?

[Sqwidge]

I dunno tbh it goes to max voltage but only tells how many mah it puts in not the total, or at least i dont think it does I have the Turnigy A6

[Grant85]

I dunno tbh it goes to max voltage but only tells how many mah it puts in not the total, or at least i dont think it does I have the Turnigy A6

Does it not say the capacity of the finished lipo in %age?

[unwind-protect]

Amps/ milliAmps is the rate you are charging or discharging, mAh is the capacity. So charging a 2.2Ah battery at 1.5A will take 1.5hours (give or take).

Voltage is electrical pressure. A 6s battery really is just 2 3S batteries in series (or 6 1S batteries). If they are at wildly different voltages, I guess it may confuse your charger's balancing algorithm.

So, as you have essentially connected the cells in series, yes you charge them as a 6S with the same capacity as the individual batteries. If you had connected them in parallel, the voltage stays the same, and the capacities are summed.

[Sqwidge]

So I charge at 2.2a then? What happens if one batt is full before the other? Will it just charge it or will it wang 22.2v into it?

[unwind-protect]

The idea of balancing chargers is that they try to keep the voltages in the cells equal. The charger probably either charges the most depleted cells first, or dissipates the energy given to the most charged cells towards the end of the cycle---exactly what it does probably depends on your charger. But it's really no different in principle to charging a single badly out of balance pack, and so shouldn't cause any problems.

[Sqwidge]

Thanks dood, is first time I have tried anything like this so am a little unsure but as long as it wont explode in my face then its all good

[mikeyp]

Hi,

I looked into a dual board but went for seperate chargers instead.. I can charge 2 different packs at the same time on 2 diff. chargers rather than mess about with a dual thingy, there's some instructions off a dual board here, the important things are in the box to the left... http://www.commonsenserc.com/product...structions.pdf

I would not use these instructions unless your board is the exact one here, you don't want to know why i respect lipos so much now!



Mike

[Sqwidge]

Hi,

you don't want to know why i respect lipos so much now!



Mike

Oh yes we do lol