Energy Management; Battery And Charging - Nokia 6120 classic Service Manual

RM-243
System Module and User Interface
System module block diagram

Energy management

Battery and charging

BL-5B battery
The phone is powered by a 3-pole BL-5B S-pack 890 mAh battery. The three poles are named VBAT, BSI and
GND where the BSI line is used to recognize the battery capacity. This is done by means of an internal battery
pull down resistor.
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