In a hurry, but need to charge your phone before you go? Throw it on airplane mode begore plugging in and it charges super quick!
*** Edited to add labels ***
You might as well just turn the phone off if you will do that and charge it even faster.
The trade off there is that you'd have to wait for your phone to boot up afterwards. Toggling airplane mode is much faster than that. Plus, if you still need some connectivity, you can enable airport mode and then toggle on wifi. Still faster charging than with all radios turned on and listening and you are still connected (except for calls/texts)