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Technical Information
Infrared (IR) Front Assembly, Rear Assembly
Two IR assemblies are connected to the I/O board via connectors P10 and P11 respectively.
One is located on the front of the NEC Versa, the second one is located on the rear of the
NEC Versa.
Each IR assembly consists of a small board with infrared LEDs. The board allows the NEC
Versa 4000 series computer to communicate with other infrared-ready computers. For ex-
ample, the infrared ports allow the user to transfer files between the NEC Versa and an IR-
equipped desktop, or print to an IR-equipped printer without using cables.
The NEC Versa 4000 series system ships with the rear IR assembly disabled and the front
IR assembly disabled. When the NEC Versa 4000 is docked to the optional NEC Versa
Docking Station 4000, the rear IR assembly is automatically disabled, and the front enabled.
Battery Pack
The system uses a rechargeable lithium-ion (Li-ION) battery as its transient power source.
The battery pack installs in the compartment next to the standard diskette drive on the bot-
tom of the Versa 4000. The battery uses 10.8 volts with a 2500 mAh capacity.
The battery pack powers the NEC Versa 4000 for approximately 5 hours with Power Man-
agement or 2.5 hours without Power management. In addition, the battery pack lets the
user know how much battery power is available via the LEDs on the front of the system, or
the battery gas gauge in the power panel.
When battery power is getting low, connect the AC adapter to a wall outlet and recharge
the battery. It takes 2.5 hours to recharge the battery pack when the system is powered off,
(Quick Charge). It takes 2.5 hours to recharge the battery while the system is powered on,
(Normal Charge).
CMOS Battery
The lithium battery (3.0 Volts, 280 mAh capacity) is attached to connector P12 on the CPU
board. It provides battery backup and prevents data loss in the system's complementary
metal oxide semiconductor (CMOS) RAM. This memory area contains information on the
system's configuration like date, time, drives, and memory. The CMOS battery lasts ap-
proximately two years.
Bridge Battery
The bridge battery saves the memory contents and system status for up to 5 minutes while
in Suspend mode. It is connected to the CPU board via P8. The AC adapter maintains volt-
age in the bridge battery when the system is powered on or off. The bridge battery provides
6 Volts, 60 mAH.
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