Technological advances in batteries that allow them to store more energy, in a smaller physical size, are pushing us towards greener alternatives to burning fossil fuels. Batteries are making a comeback and are set to become a more important part of the energy landscape. Tesla is making affordable battery powered cars and other manufactures have already signaled their intent to do the same, while home battery storage is supporting the spread of renewable energy. The key material allowing batteries to become smaller and more efficient is lithium. Historically the problem with batteries was size and weight; this made them impractical for many uses. Lithium has allowed batteries to become smaller, lighter and more efficient. Additionally, the use of lithium in batteries allows them to be recharged more efficiently, further increasing their range of applications.