User Guide

Issue 1 12/04 COMPANY CONFIDENTIAL 21

RAE-6/RA-4

6 - Baseband Description and Troubleshooting Nokia Customer Care

■ Battery

970 mAh Li-Po battery pack BP-6M is used in RAE-6/RA-4.

Table 3: BP-6M characteristics

Table 4: Pin numbering of battery pack

Figure 6:Battery pack contacts

Temperature and capacity information is needed for charge control.

The BSI fixed resistor value indicates type and default capacity of a battery.

NTC-resistor that measures the battery temperature is located inside the phone on the engine

PWB. This resistor is connected to the UEMEK BTEMP –line.

BSI resistor is connected to the battery connector pin. Phone has 100 kOhm pull-up resistor for

the line so that it can be read by A/D input in the phone.

Description Value

Nominal discharge cut-off voltage 3.1V

Nominal battery voltage 3.6V

Nominal charging voltage 4.2V

Signal

name

number

Function

VBAT 1 Positive battery terminal

BSI 2 Battery capacity measurement (fixed resistor inside the

battery pack)

GND 3 Negative/common battery terminal