The wireless charging coil needs to be connected to the circuit board inside the power bank, usually by welding. The steps are as follows:
1. Locate the circuit board inside the power bank, which is usually located at the back or bottom of the power bank. 2. Find the corresponding welding point on the circuit board, which is usually a metal contact or welding point.
3. Align the pin of the wireless charging coil with the welding point to ensure that the position is correct. 4. Use a welding tool, such as an electric soldering iron, to weld the coil pins to the solder points on the circuit board.
Please note that this process requires a certain amount of electronic equipment knowledge and operating experience, if you are not familiar with this knowledge, it is recommended to seek professional help.