Even if your iPhone keeps crashing, and you can no longer turn it on or charge it, it's time to replace the defective iPhone battery. As we have known, when your iPhone X Battery's chemistry is degraded, it may also cause your iPhone to run more slowly.
The guide is designed for replacing your battery and restoring your iPhone to full performance.
Step 1: Power off your iPhone, remove the pantalone screws. Use a Heat Gun heating or CPB screen separator to the lower edge of the iPhone for about a minute in order to soften up the adhesive underneath.
Step 2: Press both Suction Cup firmly into place. Insert an opening pick into the gap.
Step 3: Open the iPhone by swinging the display up from the left side, like the back cover of a book.
Step 4: Remove five securing the logic board connector bracket and the bracket. Use the point of a spudger to pry the battery connector.
Step 5: Disconnect the front panel sensor assembly connector and the OLED panel cable connector, and pry the digitizer cable connector.
Step 6: Lift the bracket from the edge nearest the battery, pry up and disconnect the flex cable underneath and remove the bracket.
Step 7: Remove the iPhone X Speaker connector cover. Pull the speaker away from the bottom edge of the iPhone until the adhesive gasket separates.
Step 8: Peel away any remaining adhesive residue with tweezers. Remove the Taptic Engine. Separate iPhone X Battery adhesive tab.
In a summary, you need to completely detach the iPhone X Display Screen first and remove the lower speaker and Taptic Engine for better access to the battery's adhesive strips.
For optimal performance, calibrate your newly installed battery: 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%.