These were powered by batteries for the first two years of the line's operation.

The station was powered by batteries that were expected to last about three months.

This system is powered by batteries with a claimed life of 3 to 14 hours.

"Their equipment is obviously powered by batteries," the General said.

The ship had no power to any equipment except those powered by batteries.

They will be powered by rechargeable batteries good for eight hours.

They are powered by batteries, and you can take them with you.

This light is computer controlled, powered by solar cells and batteries.

It was powered by a solar cell array and batteries.

It may be powered by compressed natural gas or electric batteries.