Connect the flex cable. Heat with Soldering Iron at 365 °C to solder the anode and cathode of the battery. Insulate with aluminum foil when soldering the anode.

Next, solder the receiver flex cable. Connect the flex cable and close the AirPods Pro case. Put the AirPods Pro into the charging case. The AirPods Pro can be charged and connected to the phone. The music can be played. Since we have removed the adhesive, there will be noise during playing.

We need to apply adhesive to seal the AirPods Pro. Apply some adhesive around the AirPods Pro. To ensure the sealing effect, we advise you to apply more adhesive.