A miniature oil pump stood next to it and, apparently powered by batteries, it was pumping away.

When powered by batteries, the boombox played for over eight hours at moderate levels without interruption.

The player's space suit is equipped with a flashlight, but must be kept charged by batteries.

There, to the north, was the heaving mountain lighted by batteries of searchlights, well above the skyline now and growing all the time.

"Now, we'll fire by batteries, and see what the total is."

Notebook computers can be plugged into a wall outlet or powered by specially designed internal batteries.

The time required for these measurements, however, was about 38 seconds, far too long for use by anti-aircraft batteries.

Players can replenish the robot's energy by collecting batteries and thus extend the possible number of moves they are allowed to make.

Maybe in a few years we really have literal thinking caps - powered by 9-volt batteries.

One used a travelling carriage, for use by batteries in the field army.