Nokia BL-4C battery pinout
From CPKB - Cell Phone Knowledge Base
This is the pinout of Nokia BL-4C battery. GND - BSI resistance: 75 kOhm.
- GND - Ground
- BSI - Battery Size Indicator
- VBAT+ - Battery positive terminal
- BTemp - Battery temperature (optional)
Compatible battery pinouts: Those batteries are thicker than BL-4C, so those may not fit in phone!