User Guide

6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
System Module Nokia Customer Care
Page 20 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
Battery
The battery block contains BSI resistors and battery identification. The BSI fixed resistor
value indicates the chemistry and default capacity of a battery. This resistor is connected
to the BSI pins of the battery connector. The phone has pull-up resistors for this line so
that it can be read by A/D inputs in the phone. A resistor array (R202) and spark caps in
the BSI lines perform ESD protection.
Figure 3: Interconnection diagram inside the battery pack
Batteries have a specific red line to indicate if the battery has been subjected to excess
humidity. The batteries are delivered in a "protection" mode, which gives longer storage
time. The voltage seen in the outer terminals is zero (or floating), and the battery is
activated by connecting the charger. Battery has internal protection for overvoltage and
overcurrent.
Figure 4: Battery pack pin order
Battery Connector
The phone uses a spring-type battery connector. This makes the phone easier to assemble
in production and ensures a more reliable connection between the battery and PWB.
Table 13: Battery Signal Properties
#
Signal
Name
Connected
From - To
Batt I/O
Signal Properties A/D
- Levels - Freq/Timing
Description /
Notes
1 VBAT (+) (batt.) VBAT I/O Vbat
2 BSI BSI (batt.) UEM Out Ana.
3 GND GND GND Gnd