Energy Management; Battery And Charging; Backup Battery - Nokia RM-333 Service Manual

RM-333; RM-334; RM-335
System Module and User Interface
Board and module connections
Figure 60 Board and module connections

Energy management

Battery and charging

Battery
Supported battery type is BL-5K.
Battery connector
Blade battery connector type.
• VBAT (Battery voltage)
• BSI (Battery size indication)
• GND (Battery ground)
Charging
This phone is charged through the micro USB connector. The phone supports dedicated, host or hub chargers.
Charging is controlled by energy management, and external components are needed to protect the baseband
module against EMC, reverse polarity and transient frequency deviation.

Backup battery

When the main battery is not attached EM ASIC (N2200) goes in backup mode using back-up battery that
supplies voltage to RTC in EM ASIC (N2200).
Issue 2 COMPANY CONFIDENTIAL Page 8 –7
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