View Full Version : Supply volts – 330d & 3S

07-29-2005, 06:59 PM
IIRC 3S packs did better when using a “lower” supply voltage; is that correct?

For example the PC PSU (@ 12 volts) would be better than a deep cycle (12.5+) or RS PSU (13.5).

Think it has to do with the calibrated voltage source’s accuracy being better when the voltage boost circuit is in use?

What about 2S, or even 1?

When charging a 3S pack to be used with a 2S pack (in series) is it best to use the same source for both, or a lower source for the 3S?



10-03-2007, 03:57 AM
I'm not a savy with these things and I want to be so heres a question for you.
What do you meen when you talk about 2S or 3S and so on?

10-03-2007, 04:13 AM
The S after a number refers to the number of cells in the battery pack-SO a 2S would be a 2 cell pack 3s is a 3 cell pack then you get into series and parrell so 3s1p pack would be a 3 cell pack used as 1 paralell or a 3s2p would be 2 separate 3 cell packs connected in paralell
Hopes this helps

10-03-2007, 05:24 AM
Thanks for the info and I made a sketch to see if I understand correctly.
I hope it works

10-03-2007, 05:28 AM
Well I'll try this again

Matt Kirsch
10-04-2007, 01:43 PM
That's an excellent diagram!

"S" is supposed to be used in reference to LiPoly packs, BTW. If you're talking about NiCd or NiMH, the older term "cell" should be used.

10-04-2007, 04:14 PM
So what your saying is that the "S" does not stand for "series". but rather stands for "LiPoly packs". So! if I have 2 set of 3 cells in series to up the voltage, and the 2 sets to up the current {Apms}, how would you write this if not 3s2p if the batteries are NiCd.