source of digital sound, be it a CD player or Blu-ray player, digital TV box or games console, laptop or computer, phone or portable music player, needs a DAC – either one that is built-in or an external one connected – to convert its digital audio to analogue before it can be ...
If you don't want to turn off your iPhone but still want to help it charge faster, you can turn on airplane mode, which disables all wireless transmission functions like cellular, Wi-Fi and Bluetooth, all of which consume power. If they're off, your iPhone can charge quicker. This wa...