Nokia BL-4C battery pinout

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This is the pinout of Nokia BL-4C battery. GND - BSI resistance: 75 kOhm.

Nokia BL-4C battery pinout


  • 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!

See also[edit]