All these factors led to a car that was light and efficient, allowing the use of a smaller battery.

The small batteries have a relatively short life, typically five to seven days.

"Current small batteries are made to power electronics over a long time and discharge slowly," he said.

Probably the small battery that worked his wireless set had gone bad.

Computers have a small battery inside them that's always on, even when you power down the rest of the computer.

These are small batteries of the type more normally used in hearing aids.

This time he couldn't find what he wanted, a small battery.

It's on a very small battery, but I know nobody likes to sit in the dark.

But what I want most is for someone to invent a really small, light battery that lasts more than five days.

The technology uses a small battery that's implanted just under the skin.