User Guide

Figure 26 Battery pin order

The battery temperature can be measured from the main board.

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.

Figure 27 Battery connector

Charging

This phone is charged through the smaller Nokia standard interface (2.0 mm plug). The wider standard

charger (3.5 mm) can be used together the CA-44 charger adapter.

Figure 28 Wide (left) and small (right) charger plugs

Charging is controlled by energy management, and external components are needed to protect the baseband

module against EMC, reverse polarity and transient frequency deviation.

Charging a dead battery

Charging of a dead battery has to be carried out via one of the two approved NOKIA chargers (AC-6 and DC-6).

Charging via a PC is not allowed since this procedure is not including a current regulator (the battery can be

charged with a too high current level).

RM-396

System Module Description

Issue 1 COMPANY CONFIDENTIAL Page 5 –9