RM-384
System Module and User Interface
Issue1 Company Confidential Page 5-11
Copyright © 2009 Nokia. All rights reserved.
Energy management
Battery and charging
BL-4C battery
The 8208 uses a Lithium-Ion cell battery with a capacity of 670 mAh. reads the resistor inside the battery pack
on the BSI line to identify the battery size. Different charging algorithm will be used for different battery sizes.
The resistors are connected to the BSI pin inside the battery connector.
Figure 52 BL-4C battery pack pin order
Battery connector
The battery connector is a blade connector. It has three blades;
BSI (Battery size indicator)
GND (Ground)
VBAT (Battery voltage)
The BSI line is used to recognize the battery capacity by a battery internal pull down resistor.
VBAT
BSI
GND
