How to replace your old iPhone battery

Posted by
iPhone6 Battery Replacement

Last updated on August 4th, 2019

Apple has confirmed that newer iOS updates to address aging lithium-ion batteries intentionally slowed down processors used in the iPhone 6, 7, and SE. The change is meant to reduce random shutdowns by throttling the phone’s CPU, but that also leads to slower performance.

All lithium-ion phone batteries lose capacity over time. You’ll probably first start to notice it after a year, then really notice it after 18 months.

The slower performance might persuade some Apple users to switch over the latest iPhone, there’s a more affordable fix — simply replace the battery.

How to check whether your battery is ready for a change

Go to Settings > Battery and, if it’s in bad enough shape, you’ll see a notification at the top of that screen that says your battery needs to be serviced.

Once you’re ready to replace the battery, you have two choices: doing it yourself and hiring someone else to do it.

Doing it yourself poses a number of risks — you void any remaining warranty, and you risk breaking your phone. But if you’d rather do it yourself, there are plenty of guides online, and the process is easier than you might imagine. It’s also slightly cheaper to DIY.


You should carefully read instructions clearly outlined in a number of YouTube tutorials and in this very in-depth explainer from iFixit.


  1. Remove Pentalobe Screws
  2. Opening up the phone
  3. Removing the battery connector bracket screws
  4. Disconnecting the battery connector
  5. Removing the front panel assembly cable bracket screws
  6. Separating the front panel assembly and rear case
  7. Remove & Replace the battery.

For this method, you’ll need smartphone repair tools, which costs around $30. Some vendors on Amazon even sell iPhone battery replacement kits for this very purpose — most hover around $25.99 for an iPhone 6 battery replacement kit and $29.99 for an iPhone 7 kit.
Note: If you do choose to do it yourself and you have a water resistant phone like the iPhone 7 or the iPhone 7 Plus, note that your phone will no longer be water resistant after you’ve opened it up.


Apple offers replacements under several conditions, according to its website. If your iPhone is under warranty or you have AppleCare+ and Apple dee