Running out of power is pretty much the biggest pain of modern day smartphones, and while sitting around waiting for them to charge isn’t usually the end of the world, there are still better things you could be doing. Enter StoreDot, an Israeli technology company with a special battery and charger that can supposedly cut re-juicing time down to around 30 seconds. The prototype charging unit, designed for the Samsung Galaxy S4, was demoed for the first time at Microsoft’s Think Next conference in Tel Aviv, Israel, today – but most of the innovation comes in the battery pack itself, rather than the charger. As special batteries are required, there’s no need to worry about the effect on the long-term life of your existing battery pack.