Question: Can this kind of cable work with a normal USB-C power bank, or does it need a wall charger?
SGG Team answer: The power side is standard USB-C, so the practical question is the power source, not the cable. A normal compatible USB-C charger or power bank is the typical use case. If your goal is longer wear while the glasses are still on, pair the cable logic with a dedicated wearable power option like SGG LOOP.