Side Quests are short answers to everyday "how does that actually work?" questions. Each one starts from zero, explains any terms it uses, and ends with a quick recap and a list of sources you can check.
Your phone's battery stores direct current (DC), yet a charging pad can fill it without a cable. This article follows the energy from the wall outlet to the battery: the adapter, the pad's coil, the invisible magnetic field, the phone's own coil and the circuits that turn it back into DC. It also covers why placement matters, why phones get warm, and what the Qi, Qi2 and MagSafe names mean.