NEC MOBILEPRO 900 - Manual (Page 114)

B-4 Specifications
Serial Interface
Baud rate — 115.2 Kbps maximum
Expansion
! One Type II PC Card slot
! One Type II CompactFlash card slot
Pre-installed Operating System
Microsoft Windows CE 3.0 Handheld/PC 2000
Power
AC Adapter
! Input Voltage — 100 to 240 volts AC, 50 or 60 Hz
! Output Voltage — 12 volts, 2A max
Batteries
! Standard main battery — One 2-cell rechargeable Li-Ion battery
pack (included))
! Extended life main battery — One 4-cell rechargeable Li-Ion
battery pack (optional)
! Backup battery — CR2032 battery (included)
Memory Backup
Approximately 5 hours (with depleted main battery) at ambient
temperature of 73ºF (23ºC).
Note The period for safe memory backup can vary with ambient
temperature and other factors. Always make sure your MobilePro is
powered off before you store it, and always recharge your MobilePro as
soon as possible after depleting the main battery.