What is this lead doing from the bottom of the cells?
Connects just under the terminal marked (C) on top of the chip.
Here are the Positive and Negative connections.
The 3/4 terminals connect to the camera... + - and temperature sensor. (c) is unknown to me, does it mean check?
Only + - connect to the charger, so i'm sure of the use of the 4th terminal, but for testing purposes?
I want to change to larger capacity 7.4V cells, but am unsure what to do with the third lead connecting to the circuit only marked BM (it looks like).
(I don't read a voltage off it, but would I read a current if it was running in the camera?)
Thanks