http://www3.towerhobbies.com/cgi-bin...&I=LXTCE1&P=ML

Just go to any battery supplier, find LiPo, and just take a look. The basic, very basic configuration is 2S for two series or two cell or 3S for three series or three cell pack.

Our receiver cells for glow operation, for instance is 4.8 volts for four cells in series.. 1.2 volts per cell connected in series.

The below drawings show two samples of the same thing: 2 cells in series, or 2S. It is also called 2S1P. Why they add the 1P I have no idea except that it is not 2P. That would look like the third picture. Parallel = additive current same voltage. Series = additive voltage, same current.

CGr.