How can I disable the low-battery sound in Cyanogenmod? I have a rooted Samsung Galaxy S3 running Cyanogenmod 11 (20140804-SNAPSHOT-M9-i9300). When the battery hits ~15% or 5%, an alert appears with a warning sound. How can I disable this warning sound (without removing the popup alert)?

I've tried removing /system/media/audio/ui/LowBattery.ogg; this did not prevent an alert sound, but the sound did change, perhaps to a fallback. I also tried installing "Suppress Low Battery Sound" (aka "Disable Low Battery Beep" via the web browser), but this had no effect either. I tried installing Sound Manager, and turning the system sound down, but this also had no effect.
As per advice from Narayanan, I replaced /system/media/audio/ui/LowBattery.ogg with another .ogg file. The next time it was triggered, the new file played.

I then tried placing an empty file at /system/media/audio/ui/LowBattery.ogg, but this did not work.

Finally, I downloaded a slient .ogg from here, placing it at /system/media/audio/ui/LowBattery.ogg. This worked perfectly.