If you have a smartphone, you probably know the horrible feeling of packing up to leave the house, only to realize your smartphone is about to die. Such a situation leaves you in a pickle. Do you risk being late for a couple minutes of precious, precious charge? Or do you resign yourself to an afternoon without email, Instagram and Candy Crush? Enter StoreDot, an Israeli tech startup that hopes to make this exact conundrum a thing of the past. The company claims to have created a new battery pack that can fully charge your phone in a mere 30