Here's the thing about batteries: they store energy. Lots of it. Channeled correctly, that energy does really awesome things for us -- but channeled chaotically, and... well, you know where this is going, don't you? A man shopping in a Lenovo store in mainland China has been killed after the phone in his chest pocket exploded, severing arteries and leading to massive blood loss. The make and model of the phone and battery have yet to be identified, but seeing how this is the seventh high-profile case of an exploding phone in China in the last six years, it really gives you pause before installing that shady off-brand juice, doesn't it?