Plugging Apple’s USB power adapter into a wall outlet offers the quickest charge time for your iPhone, but this method isn’t always the most convenient. As an alternative, your computer’s USB port will charge the iPhone, but you need to be careful which USB port you use. Keyboard USB ports do not offer sufficient power to charge your iPhone, and USB hubs may have available power divided among multiple devices. For the speediest charge time, use a primary USB port and disconnect all other USB devices. Tips Writer Bio
