Energy management
Battery and charging
BL-5C/BL-5CA battery
The phone is powered by a 3-pole BL-5C 1020 mAh/BL-5CA 700 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 25 Battery pin order
The battery temperature can be measured from the UI flex.
RM-561
System Module
Issue 1 COMPANY CONFIDENTIAL Page 5 –7
Copyright © 2009 Nokia. All rights reserved.
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