The lithium-ion batteries that we rely on in our phones, laptops and electric cars have a liquid electrolyte, through which ions flow in one direction to charge the battery and the other direction when it is being drained. But should we pin our hopes on them? What are solid-state batteries? These devices will be lighter and more powerful than current batteries, giving electric cars a range of 1200 kilometres with a charging time of just 10 minutes. Toyota says it has made a breakthrough that will allow “game-changing” solid-state batteries to go into production by 2028. These devices could be lighter and more powerful than current batteries Computerised illustration of solid-state battery production.