Solar batteries and fuel cells which some of us already use to power up our homes can't actually store energy. That's why a lithium-ion battery that can last for about a week before needing a recharge is something else... making energy sources such as solar and wind power more feasible.
Also, you can buy energy when it is cheapest, and don't need to worry about power outages anymore."
Read more of this story at Slashdot.
