There are 4 lipo cells involved in a saddle pack. For example, on a 4200mah, 2cell, 7.4v saddle pac..... Each side of the pac has two cells wired in series for 7.4v nominal. The individual side is good for 2100mah at 7.4v. Then these two sides are wired in parallel to yield the final mah.

Dont believe me? There is a person with the screen name duster 360. He has posted many messages about wiring. Look him up.