Diff between 4 pin & 3 pin mobile battery

[Vindhyachal.takniki]

1. I have attached a pdf file in which there is 4 pin mobile battery (first 3 pages) & then 3 pin mobile battery(next 3 page).

2. I have to replace 4 pin battery to 3 pin battery.

3. But I dont know what are connection of 4 pin & 3 pin here?

4. On various internet pages, I dont find any concesus, some says it is thermistor, some says its SDA/SCL  or 2 wire interface. Ofcourse its due to each manufactuere can make in their own type.
Anybody has idea of this specific battery?

[tszaboo]

I recently saw a battery layout, where the other two was a thermistor and a NFC coil.