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Old 04-23-2014, 12:28 AM   #1
garyp1029
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Default 3S or 3S1P

Battery questions: (1) What is the difference between 3S and 3S1P batteries? (2) Does one parallel charge both 3S and 3S1P in the same way? Thanks. Gary
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Old 04-23-2014, 02:52 AM   #2
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Same thing. As I read it in the 'Everything You Ever Wanted to Know About Electric Powered Flight' thread here, the 'S' stands for Series, as in how many cells are in series. The P tells you how many of those xS packs are connected in parallel. I think they're getting away from the P part. At least that's how I read it.
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Old 04-23-2014, 03:30 AM   #3
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Originally Posted by xmech2k View Post
Same thing. As I read it in the 'Everything You Ever Wanted to Know About Electric Powered Flight' thread here, the 'S' stands for Series, as in how many cells are in series. The P tells you how many of those xS packs are connected in parallel. I think they're getting away from the P part. At least that's how I read it.

Yeah, as far as your charger goes, it doesn't care if your battery is internally wired as "1P", "2P", or what ever. As long as only one balance cable is brought out for the entire battery pack.

As for me, I'm using those 2300 Mah (Milliampere Hour) A123 cells, where they require two parallel batteries to get up to a 70 Amp capability. Most of mine are wired as 6S2P configurations. The 6S2P requires 6 times 2 or twelve cells for the battery pack.

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Old 04-23-2014, 04:56 AM   #4
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Yep... most of our batteries are now 1P and so they don't note the P.

It used to require paralleling to get much above 1000 mah capacity because we were repurposing cell phone batteries.
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Old 04-27-2014, 04:45 AM   #5
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Yes, most packs today are 1P so we rarely see that notation any more.

But, to review

We increase voltage by putting packs in series.

the nominal voltage or a LiPo cell is 3.7V so a 3 cell or 3S or 3S1P - 11.1V (3.7X3)

We parallel cells to get higher capacity or higher amperage output.

So if we take a 3s1500 mah pack and parallel two together we get 3S2P 3000 mah at 11.1V.

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