Believe it or not, there's a new project in town that intends to put your iPhone on the front lines of personal defense. The Yellow Jacket is designed as the first iPhone case to pack a 650K volt stun gun on board. With all of that extra juice, the case also provides an extra 20 hours of battery life for your mobile device.
Safety features are built in to ensure you don't get zapped while playing Angry Birds, but if you need to incapacitate an attacker, firing up the stun gun takes less than a second. Flip a safety switch and turn down the cap to expose the electrodes at the top of the case. Pressing the activation button will send 650K volts coursing through anyone unlucky enough to be touching the contacts.