Anyone who’s used an iPhone X for even a few days has discovered that while these phones are more powerful, and more fun, than perhaps any other cell or smartphone, that fun comes with a price: battery life. Here, we are going to offer you the tip from reddit on how to improve iPhone X battery on iOS 11.3.1.

Important note:

• Please backup file before editing, you can copy and past it on other /var folder.

• Check the Link to explanation what backboard is.

• This may not work on some iPhones.

Operations

Step 1 Open Filza and search for com.apple.backboardd.plist in System/Library/LaunchDeamons. 

Step 2 Click on it, then tap on the “!” on the right side and disable RunAtLoad and KeepAlive (Please do not delete anything, just switch on -> off)

Step 3 Save, and then reboot your phone.

Step 4 Install a tweak Called Jetslammed

That’s it. According to the redditor, he got about 60% battery on a normal working day with a single charge. 

To know more battery status of your device, you can check battery details on 3uTools.