Ever boarded a Qantas flight with your iPhone battery perilously low after a long day on the go, but didn't pack the necessary USB cable to recharge your iPhone during the flight?
Of course you have. It's Murphy's Law: The Business Traveller Edition.
You've probably also jumped onto a flight and realised you forgot to charge your iPhone overnight or at the office, leaving you up the same low-battery creek without a paddle.
If it happens that you're on a domestic Qantas Airbus A330 flight – typically on the east-west routes, and also sometimes between Sydney and Melbourne – and you spy an iPad Mini tucked into the seat pocket, you're in luck.
Roughly half of Qantas' fleet of domestic A330-200 jets are older aircraft lacking the usual video screen in the back of each economy seat.
Instead, Qantas fitted out those jets with an iPad Mini which can tap into a library of inflight entertainment content over WiFi, in what the airline terms Q Streaming.
But it's not the inflight movies, TV shows, music or even the iPad that matter to you and your low-battery iPhone.
What matters is that hanging off each iPad Mini is a USB cable so that the tablets can be easily recharged between flights.
And it's a simple job to borrow that cable, plug it into your iPhone and the seat's USB power socket to top up the battery en route.
The iPad end of the USB charge cable – which sports Apple's standard Lightning connector – is nestled into a small bracket extending from a plastic shell which holds the iPad Mini and its cover.
To get at that cable, start by gentling the iPad Mini out of the plastic rear shell. Remember, easy does it – you don't want to break anything!
Slide the iPad up from the plastic case and the Lightning connector will come along for the ride, as it's not fixed into that bracket.
Now you can lift the iPad Mini out of its shell to provide easier access to the cable and Lightning connector.
Remove the cable from the iPad Mini, plug the USB end into the USB socket between your seats and connect the Lightning end into your iPhone.
Now, let the charging begin!
On an average 90 minute flight between Sydney and Melbourne there's enough time to boost an almost-flat iPhone 6 Plus battery back to around 40%, while smaller-screen iPhone 5 and iPhone 6 models should be half-full by the time your flight lands.
But don't forget: when you're done, put everything back together exactly the way you found it!