Sometimes there is just no time to get the full charge that you need. But that doesn't mean there aren't any quick tricks you can use to make the process a little more successful. By using features that were built with an entirely different purpose in mind, we can positively impact other areas of phone usage.
The flight mode feature was designed to stop all signal transmission, in order to remove the chances of interrupting the computers and radios used to fly planes. When your phone is in flight mode, it isn't using up much battery searching for signals, being connected to Wi-Fi, and doing all the other things phones do when they're online. If you pop your phone into flight mode while you're charging it or trying to preserve battery for later, you'll get great results.