So, if you go to your local magazine shop this morning, you'll see the latest copy of Esquire Magazine with a neat gimmick - EPaper embedded in the front cover, with a simple animated text display.

Of course, we immediately bought one in the office, and tore it open - here's what we found:



Ah...yes...right there in the middle, 6 CR2016 batteries.

On Amazon, they are 2 for $3.49 ($1.74 Each).
The cover price of Esquire Magazine is $5.99, so you pay $0.99 each for the batteries and you get a free magazine!