iPhone 3G with battery percentage no JB well sort of lol
If you have problems with your jailbroken iPhone or are going to the Apple store and you restored your phone without deleting Sbsettings. Plus you had the battery percentage turned on. Later on you'll notice the battery percentage on your phone even though your phone isn't jailbroken anymore. I guess the battery percentage is inserted into the back up when you previously backed up before restoring.