If there's any alcohol solution remaining in the phone, carefully wipe it off or allow it to air dry before installing your new battery.

Reinstall the Taptic Engine and speaker before installing a new battery. This helps keep the battery aligned correctly during installation.

If your new battery does not come with adhesive preinstalled, refer to this guide for help replacing the adhesive strips.

Perform a force restart after reassembly. This can prevent several issues and simplify troubleshooting.