Unlike internal batteries, the Elitebook’s 12-hour model is charged externally while unattached. It then slots onto the EliteBook and is surprisingly unobtrusive given its size of around half the laptop’s footprint.

The study’s authors are particularly interested in the electric car market, saying ‘owing to its exceptionally high energy potentiality, the lithium–air battery is a very appealing candidate for fulfilling this role.’ But with a whopping 13,500Wh/kg – up to 10 times the capacity of today’s lithium batteries – imagine what it could do for your handset?

Then there’s the million little things we can all do on a daily basis, as outlined on the blog 101 Things Designers Can Do To Save Earth, where you can read about joining like-minded sustainable designers, turning your computers off at night and more.