The power required to charge a battery in so little time is enormous. Who cares if the battery can accept a charge that fast, how do you couple the phone to the charger to accomplish this feat? a typical "fast" charger supplies 0.56 ma per second to the phone (2 amp charger), charging the phone in about 75 minutes (2400 mah battery.) to charge that phone in only 30 seconds, you'd need a 288 amp charger to supply 80mA per second into the battery.
What they have is something in a test tube that can accept fraction of a ma charge in a fraction of a second without catching fire... so can they extrapolate that into a 30 second cell phone battery that is 1000s of times bigger - UH NO! The prototype that was demo'd is just a hoax, like the magnetic "free energy" machines that come up from time to time.