Energy Management; Battery And Charging - Nokia RM-779 Service Manual

RM-779
System Module
System module block diagram

Energy management

Battery and charging

BP-3L battery
The phone is powered by a 3-pole BP-3L 1300 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.
Figure 43 Battery pin order
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