The Powerwall is still too expensive in South Africa for widespread use, but it heralds big changes to come in energy storage.
Elon Musk thinks batteries suck, but this didn't stop his customers from buying the entire supply of the Tesla Powerwall in a matter of days.
A team led by Prof Hongjie Dai at Stanford University made a breakthrough by accidentally discovering that graphite made a good partner to aluminium.
A United States company has come up with a baton-shaped device that charges gadgets using power generated by walking, hiking or running.
South Africa plugs into the environmental benefits of rechargeable batteries, writes Yolandi Groenewald.