User's Manual
Table Of Contents
- Contents
- Figures
- Tables
- Document history
- Introduction
- Product concept
- GSM application interface
- GSM/GPRS operating modes
- Power supply
- Power up / down scenarios
- Automatic GPRS Multislot Class change
- Charging control of the GSM part
- Power saving
- Summary of state transitions (except SLEEP mode)
- RTC backup for GSM part of XT55/56
- Serial interfaces of the XT55/56 GSM part
- Audio interfaces
- SIM interface
- Control signals
- GPS application interface
- GSM and GPS antenna interfaces
- Electrical, reliability and radio characteristics
- Mechanics
- Reference approval
- Example applications
- List of parts and accessories
XT55/56 Hardware Interface Description
Confidential / Released
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XT55/56_hd_v02.06a Page 44 of 125 17.12.2004
3.5.2 Recommended battery pack specification
Table 8: Specifications of recommended battery pack
Battery type Li-Ion
Nominal voltage 3.6V
Capacity 800mAh
NTC 10k ± 5% @ 25°C, B (25/85)=3435K ± 3%
Overcharge detection voltage 4.325 ± 0.025V
Overcharge release voltage 4.075 ± 0.025V
Overdischarge detection voltage 2.5 ± 0.05V
Overdischarge release voltage 2.9 ± 0.5V
Overcurrent detection 3 ± 0.5A
Nominal working current <5µA
Current of low voltage detection 0.5µA
Overcurrent detection delay time 8~16ms
Short detection delay time 50µs
Overdischarge detection delay time 31~125ms
Overcharge detection delay time 1s
Internal resistance <130m