You will have to take a look in your
/boot/grub/grub.conf.
See if at the end of the line kernel /vmlinuz* where the * is your kernel # and add at the end of this line
acpi=on should be there if not then add it in using your favorite text editor.
You will then need to re-boot now your acpi should be enabled then if you are using gnome which is the Fedora default DM, right click on an empty part of the panel
add to panel --> utility --> battery charge monitor. Now you should see a battery charge icon.
Let us know how it goes
