Issue:
-If you installed Windows 98 while keeping the laptop
plugged in an ac adapter, you may not get a battery
icon
-Windows 98 won't shutdown and stays on the shutting
down screen

Reason: ACPI isn't installed

Enable/Disable ACPI

Enabling/ Disabling -

The following instructions will allow enable ACPI with Windows 98:

To enable ACPI after Windows 98 is installed, run Regedit and go to the following key in the registry: 

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Current Version\Detect

Create a new DWORD value called "ACPIOption" and set it equal to 1. 

In Control Panel, run Add New Hardware and choose hardware detection. ACPI should be detected and installed. After the system is rebooted, all ACPI-enumerated devices will be set up again. 

You don't need to insert your cd, just direct the driver finder to C:/win98

I reccomend using Windows ME for less hassle.