MiTAC 8050QMA Service Manual page 38

When AC in or system main battery inside, CMOS battery will consume no power.
AC or main battery not exists, CMOS battery life at less (220mAh/5.8uA) 4 years.
1.3.8 I/O Port
One Power Supply Jack
One External DVI-I Connector For DVI Display
Supports four USB port for all USB devices.
One MODEM RJ-11 phone jack for PSTN line
One RJ-45 for LAN.
One IEEE1394 port
One TV-Out port
Reserve 1 connector on board for USB 2.0 Device
Headphone Out Jack.
Microphone Input Jack.
80 50QMA N/B Maintenance
80 50QMA N/B Maintenance
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