Originally Posted by
spookie
I understand what Dave is saying, but OP claims it says 2S/ 7.4 volts on it. If it's a dual cell wired internally as a single, how can a charger monitor each of the two cells in the pack during charging? You would have to have a parallel board for each 2S connector, EACH battery having 2 cells lol. Now as to who runs dual 7.4 volt batteries in series, 14.8/ fully charged is 16.8 volts, which equals 4S, apparently everyone that runs dual seried packs of this type, is running at 4S voltage.
No battery manufacturer would ever label a single battery with combined voltage of two, assuming you will be using them in pairs. That's against the law, feds would be all over that. If a battery is lost, the improper label would cause improper charging.
Lol, I think we need a picture of both packs.