Skip to main content

Intro History: iPhone 4S Battery Replacement

Edit by Sam Goldheart

Edit approved by Sam Goldheart

Before
After
Unchanged
Introduction
Replacing the battery on the iPhone 4S requires minimal disassembly.
For optimal performance, calibrate your newly installed battery: Drain battery below 10%, then charge uninterrupted to 100%.
Conclusion
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%.