swollen, [https://www.ifixit.com/Wiki/What_to_do_with_a_swollen_battery|take [[What to do with a swollen battery|take appropriate precautions|new_window=true]. precautions|new_window=true]]. [ … ] performance, after completing this guide, calibrate your newly installed battery: Drain battery below 10%, then Charge it to 100% and keep charging it for at least two more hours. Then use your iPhone until it shuts off due to low battery. Finally, charge it uninterrupted to 100%. [ … ] [video|https://www.youtube.com/watch?v=i196dj1cZls]

To reassemble your device, follow these instructions in reverse order. [ … ] If your iPhone reboots constantly after the replacement, you need to do a "Hard Reset" by holding down the Home- and Sleep-Button for about 10 seconds (until the device restarts). [ … ] If you have WiFi and/or Cellular connection problems with the new battery, try restoring the device using iTunes. [ … ] For optimal performance, calibrate your newly installed battery: Drain battery below 10%, then charge uninterrupted to 100%.Repair didn’t go as planned? Check out our [https://www.ifixit.com/Answers/Device/iPhone%204S|Answers community] for troubleshooting help.