I am an Apache user however I'm pretty sure the reg keys should line up pretty much the same or have a vauge likeness of one another.
[HKEY_CURRENT_USER\ControlPanel\Notifications\{A877 D663-239C-47a7-9304-0D347F580408}]
"Default"="Power: Low battery"
"Options"=dword:9
"Duration"=dword:0
"Wave"="lowbatt.wma"
The "Default="Power: Low Battery" is what I added to make low battery setting appear in the Sounds and Notifications control panel. This way, not only could you just permanently disable it, you can customize it also just as you would any other notification.
I apologize if I'm outta my league here posting in the Titan section

, but I'm pretty sure this will work. But if it doesn't, again... sorry