11.   A battery pack on a waist belt powers the headset and a switch allows the coach to alternate between barking at his assistant coaches and soothing his quarterback.

12.   A dead battery pack?

13.   A good zap with that battery pack of yours and BOOM!

14.   A subsidiary, Ovonic Battery Company, in a joint venture with General Motors, is building the new battery packs for the automobiles.

15.   A typical battery pack lasts more than a day.

16.   But in the current generation, a satellite phone is the size of a laptop computer and works from a battery pack.

17.   But they also carry electric motors and a small battery pack.

18.   By next summer LaStella hopes to replace the lead acid battery pack with one using fiber nickel cadmium.

19.   Cameramen flocked to the sudden explosion, praying their battery packs were fresh.

20.   DeWalt uses a battery pack that slides in laterally, rather than the plug-in version most other makers prefer.