In general, you can break down today's battery-operated devices into three categories.

This was not the battery-operated device I own that f opens just about anything.

A separate, battery-operated device went into action.

These battery-operated devices fit tightly between the door or window and its frame, preventing it from being forced open.

Resperate is the brand name of a portable, battery-operated personal therapeutic medical device used to lower blood pressure.

This is especially important for battery-operated devices such as cell phones.

The battery-operated device, the automatic implantable cardioverter-defibrillator, has helped prolong the lives of about 10,000 people since it was first used in 1980.

Therefore, battery-operated devices are not designed as repeater units.

A patient could strap the battery-operated device around an arm and switch it on for a few seconds.

Saving electricity is also important, such as in the case of battery-operated devices.