Suddenly the battery on my iPhone 4 is draining very quickly, settings have not been changed, I thought it was find friends so removed this app, tried turning all location services off but still loosing power fast. Three hours now down to 45% with only a few emails sent and received. Oh and WiFi is on Any ideas?
If you have a Push email account (MS Exchange, Yahoo, Hotmail, gmail, AOL, iCloud) the mail app may be stuck trying to deal with a corrupt data record. Go to Settings/Mail,Contacts,Calendar, tap on the account name and turn off the switches for mail, contacts, calendar, etc. Then reboot the phone by holding the HOME and SLEEP buttons until an Apple logo appears (typically about 10 seconds). Then go back to Settings and turn the switches back on. Wait an hour before testing again, as the account needs to resync, and this will use power.
Facebook is another app that can get "stuck", as can Find Friends (which you already suspected), or many other social networking apps.
BTW, the other suggestion to recalibrate the battery gauge is also good advice, but it probably won't solve this particular issue.
Message was edited by: Lawrence Finch