Which is better 2S1P or 2S2P?

[maddmatt]

I'm running 2s2p batts and they seem great. Is there a performance difference between them? Looking for the best type of 2S batt. for SAW.

[Diegoboy]

thread moved

[Diegoboy]

2p doubles the mAh (run time)

[maddmatt]

OK So whats the difference between 2s1p 5000mah battery and a 2s2p 5000mah battery? Is there a performance difference? Are both legal for SAW?

[Make-a-Wake]

A 2s2p 5000 battery consists of four 2500 mah cells inside one pack. Two paralleled and then connected in series to the other 2 paralleled cells. It equals 5000 mah. True 2p in FE lingo is taking, as an example, two 6s 5000mah batts and connecting them in parallel for 6s2p and 10,000 mah.

[Fluid]

The terminology is getting confused. A 2S1P/5000mAh battery is two 5000mAh cells connected in series. Normally, a 2S2P/5000mAh battery is two 2S1P packs made from 5000mAh cells connected in parallel, although sometimes folks will say 2S2P/10,000mAh for the total capacity.

When you parallel packs you do two things - you double the capacity, which means that you also double the effective discharge rate. For SAW use you need high cell discharge ratings and high cell capacity to deliver the maximum voltage, thus the maximum power. For most SAW classes paralleling is okay as long as the total capacity is no more than 10,000mAh.

If a pack was made from two 2S1P/2500mAh packs in parallel to make 2S2P/5000mAh total capacity, it would be inferior power-wise to two 2A1P/5000mAh packs in parallel with a total of 10,000mAh capacity. But the discharge rating "C" can change things around, so both values must be known.


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[Goonboy2]

So assuming everything else is the same - total battery weight, same discharge rate, then two 6S 2500mah batteries in parallel would provide more amps and a slightly shorter run time than two 3S 5000mah batteries in series. And would be the preferred setup, right?

[ice329]

I got several 2s2p 5000 packs. They kick butt and are more then 5000mah. BUT and I am not 100% but i think when you balance them it only balances two cells together, it balance both sets of cells but two together if you know what I mean. there is actually 4 cells per pack so for that reason I am leary, I never had a problem but would like to balance the cells individually. Who knows maybe the cells average out but I would like to be able to know for sure. only drawback I see

[Make-a-Wake]

So assuming everything else is the same - total battery weight, same discharge rate, then two 6S 2500mah batteries in parallel would provide more amps and a slightly shorter run time than two 3S 5000mah batteries in series. And would be the preferred setup, right?

If the C rating is the same in your example, the output would be the same, no amperage increase and no runtime change either.

"True" 2p based on the two 3s 5000 batts in your example, would be two 6s 5000mah batts in parallel..................which would be 6s, but 10,000 mah. Simply put, if you have a battery of 6s with 'X' mah, you add the same battery setup in parallel for 6s X + X............6s 2X..........or 2p.

[Goonboy2]

I agree, on paper a parallel setup should have no advantage over a series setup all other things being equal ( C rating, voltage, mah & weight). But I am asking if there is some other advantage of a parallel setup. Is the voltage curve the same in each setup? Does a series setup produce more heat?

[Boaterguy]

a series setup with bullet connectors will produce slightly less heat in the connectors than a parallel setup, unless the packs are wired parallel internally.
this is because batteries with bullet connectors can be connected directly, in parallel you need an adapter.
Pyro will vouch for the parallel because then you will buy his connectors.

[Make-a-Wake]

Well, if you series two batteries you'll have about 12" of wire between them..............a tad bit of amp loss and a bit more heat as opposed to one battery with all the voltage. But with two series batteries you can place them on either side of the motor and have more adjustment room.

[Boaterguy]

he's talking about 2 packs series or 2 packs parallel, i'd say you'd have more wire with parallel.

[Make-a-Wake]

he's talking about 2 packs series or 2 packs parallel, i'd say you'd have more wire with parallel.

Nope

[Boaterguy]

bad wording, higher resistance because of more connectors.