The video shows the process of modifying an iPhone to support USB-C and fast charging. The creator experimented with cutting and connecting a lightning connector, added resistors, and found a circuit board called C91 that communicates with the phone and allows for fast charging. They attempted to extract the C91 board to replace it, but it was too complicated and ended up making a custom flexible PCB with a USB-C connector. They faced challenges with data wire colors and damaged charging board CC pads but succeeded in the end. The modified phone charges at 26 watts with a power brick.
1. The author tried to charge their iPhone using a lightning connector and a 5 volt power supply, but it didn't work.
2. Apple requires special voltages on its data pin for its phones to charge properly.
3. The author found that the lightning cable contains a tiny circuit board called c91 that communicates with the phone and allows it to accept fast charging.
4. The author attempted to extract the charging board and lightning port to attach a c91 board and USB Type-C, but ended up cracking the phone screen.
5. The author later successfully extracted the c91 board and created a custom flexible PCB for it with a modified USB Type-C connector.
6. The author had difficulty getting the fast charging to work properly, but eventually found and solved the problem by flipping the data pin connections on the PCB.
7. The author enlarged the charging hole to accommodate the new connector and was able to charge their iPhone at 26 watts with a higher wattage power brick.