Ten years ago, you always had to
make sure you had the correct power supply for each of your gadgets.
Usually, that power supply wasn’t even labeled. Today, you can charge
your phone at your friend’s house, plug your ebook reader into any
computer, and download photos from a digital camera directly to your TV,
all thanks to a standardized connector. If you have a modern USB device —
really, almost any smartphone, tablet, or camera , you should be able
to plug into a high-amperage USB port and enjoy faster charging.