I keep hearing in my dreams a sort of "ding" sound made by my phone (running Android 4.1). It's trying to tell me to disconnect the charger from the wall socket (to be greener), but unfortunately it's doing this in the middle of the night, and it's annoying. There is no risk to damage your phone if you keep it plugged in beyond this point anyway. Well, there seem to be apps that let you manage the notification sound (like Battery full notification ), but they seem overkill for what I want. Luckly, I found this thread in my searches: http://androidforums.com/samsung-galaxy-s2-international/331058-stopping-fully-charged-sound.html#post2819281 If you have a rooted phone, you can follow the instructions in the thread, or follow these steps in a terminal emulator on your phone: su cd /system/media/audio/ui mount -o remount,rw /system mv TW_Battery_caution.ogg TW_Battery_caution.ogg.bak mount -o remount,ro /system exit exit It renames the notification s...