Yellow Jacket is an all new iPhone case that doubles as a powerful stun gun, zapping potential threats with 650,000 volts of electricity. Not only that, the case also doubles as an additional battery for the iPhone itself, providing up to an additional 20 hours of use – assuming you don’t use the stun feature of course. Sounds interesting, doesn’t it?

The story behind Yellow Jacket is also interesting if not disturbing, apparently it was created by a guy who was robbed at gunpoint in his own home. That story and more are told in the slightly overdramatic promotional video embedded below, but it does a good job of showing the cases application as a self defense tool.

As you probably expect, the Yellow Jacket case does add some additional bulk to the iPhone, totally about an inch thick and weighing 4oz. Even still, that could be a small price to pay for some added security for those who feel they need it.

The Yellow Jacket stungun case will retail for $125 after it’s produced, but can be “pre-ordered” through IndieGogo at $85 and $100. Current versions fit the iPhone 4 and 4S, but more smartphones will be supported soon.

Read more via osxdaily