User Guide

Engine and UI & card modules connections

Figure 48 RM-244 UI

Energy management

Battery and charging

BP-6MT battery

The phone is powered by a 3-pole BP-6MT battery S-pack 1050 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 49 Battery pin order

The battery temperature is estimated by measuring separate battery temperature NTC via the BTEMP line.

This is located on the main PWB, at the place where the phone temperature is closest to the battery

temperature.

Battery connector

The battery connector is a blade connector. It has three blades;

• BSI (Battery size indicator)

• GND (Ground)

RM-244

System Module and User Interface

Issue 1 COMPANY CONFIDENTIAL Page 6 –7