The light can store energy in batteries for up to three days without sun or wind.

This can also be done by a electronics in battery.

They could be essential for the next big revolution in batteries.

Some materials used in batteries are damaging to the environment.

About 86% of all cadmium production was used in batteries during 2009.

The straight kind was very boring and stayed in batteries.

I could barely keep us supplied in batteries as it was.

During times of low demand, excess power can be stored in batteries for future use.

These soak up the sunlight and store it in batteries.

The company's position is that the current state of technology, particularly in batteries, does not allow a practical electric vehicle.