2S2P means 2 cells in series and 2 in parallel. 4 cells inside. Still give you 7.4v, but each capacity is smaller, e.g. 2500mAh. 2 in parallel to make 5000mAh (3.7V), and then 2 more in series to make 5000mAh 7.4v
+ 2500 -
+ 2500 -
- 2500 +
- 2500 +
2S1P would be 2 cells inside, each 5000mAh, and just simple connected in serial.
+ 5000 -
- 5000 +
2S1P claimed to be better, and cells won't get "fat" easily.
Stated 2S1P, inside 2S2P, can actually bring it to the 消費者委員會