Hi Solam. I have a Dell laptop with Vista and this is how I would do it so it should work for you.
Right click your desktop and click Personalize (Was Display Properties in XP days).
Now select Screen Saver.
At the bottom of this new window should be a Power management section, select 'Change power settings..'.
Now you will have some power setting plans that come with your laptop. You can go straight here from Power Options in control panel btw. You can change your currently selected one or change to another plan and change that. When you have selected your plan next click 'Change plan settings' for the relevant plan.
Under this new window you will have sleep and display turn off settings, what you are looking for is 'Change advanced power settings'.
Now you have a tree list view of settings, you are looking for 'LED Intensity' that is under 'Additional settings' on my plan. Under 'LED Intensity' change the 'On battery' settings to 'Maximum'.
I hope you have similar settings and this helps you out. Changing this will have 2 disadvantages, your battery life will decrease and secondly you wont know your laptop is accidently unplugged until it shuts down!