RH-109
System Module Description
Energy management
Battery and Charging
BL-4B battery
The phone is powered by a 3-pole BL-4B 700 mAh battery. The three poles are named VBAT, GND and ID where
the ID line is used to recognize the battery capacity. This is done by means of an internal battery pull down
resistor 68Kohm
Figure 8 Battery pin order
The battery connector is a blade connector. It has three blades,
• VBAT (Battery voltage)
• GND (Ground)
• ID (Battery size indicator, The ID line is used to recognize the battery capacity by a BL-4B battery internal pull
down resistor 68Kohm).
Figure 9 Battery connector
Charging
This phone is charged through the µUSB interface only (there is no separated connector for a charger), Support
two charging mode for normal USB charging and two approved NOKIA chargers(AC-6 and DC-6) charging,
Charging is controlled by energy management, and external components are needed to protect the baseband
module against EMC, reverse polarity and transient frequency deviation.
Issue 1
COMPANY CONFIDENTIAL
Page 5-9
Copyright © 2008 Nokia. All rights reserved.
VBAT
GND
ID
Содержание 1606Arte
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