This New Kind of Battery Can Be Fully Charged in Less Than 30 Seconds The anode is polymer chains and the cathode is a sheet of graphene, A novel approach to an energy storage device run on an aqueous electrolyte can go from flat to fully-charged in just 20 seconds, making it perfect for portable electronics that frequently need a quick boost. The battery uses liquid water-based electrolyte and a graphene electrode. Just think: laptop/smartphone batteries that don't explode... Hasn't been commercialized yet but they claim they have worked the bugs out. I'm a little skeptical because to fast charge a battery it has to have almost zero internal resistance.