Graphene offers higher electrical conductivity than lithium-ion batteries. Graphene batteries are also lighter and slimmer than today’s lithium-ion cells. This allows for lightweight, faster-charging cells that are able to deliver very high currents as well. This is particularly useful for high-capacity car batteries, for example, or fast device-to-device charging. Finally, graphene is safer. While lithium-ion batteries have a very good safety record, there have been a few major incidents involving faulty products.