Seriously we aren’t joking here, this fellow here could actually do that
Charlie Miller is a hacker who discovered a way to use the Macbooks Internal battery to shut it down or even blow it up as and when he wishes, but hey he is the good guy. He demonstrated the method at the Black hat developers Conference at Las Vegas. He displayed to shut down the battery but choose not to explode it.
Technically speaking batteries now a days come equipped with its own firmware that intetacts with the operating system on the computer and a change in firmware could allow us to do a lot of things like showing wrong charging level to more worst catostropie like blasting the computer.
What are his intentions?