Electric cars need better batteries to improve acceleration without adding too much weight. Researchers are exploring over 30 types of batteries with higher energy density than lead-acid ones. Lead-acid batteries currently only store a quarter of their potential capacity. The Flinders electric car uses a special motor that allows for a lighter acid, extending the battery's lifespan. While sodium-sulphur batteries have the needed energy density, their high operating temperature limits their use to commercial vehicles. Lithium-organic electrolyte batteries show promise and can work at normal temperatures. Electric cars may not replace all cars but could be great for city driving as a second vehicle. Commercial fleets are likely to be the first to adopt electric vehicles due to lower costs.