From Computer World:
Improving battery technology is seen as pivotal to transportation and storage, particularly around the need to store solar and wind energy.
Chu said the idea of seeking a 5X improvement is really around getting the battery and energy storage prices to a point where they will gain widespread adoption.
“We look very carefully at the price points,” said Chu, who cited the impact of falling prices on cell phones of PCs, as examples of how low prices trigger mass adoption.
This is way overdue. Batteries rule our lives already in cell phones and will rule them even more as they invade transit. We need the ability to store power more efficiently if we’re going to be making optimal use of electricity going forward.