51.   The new fuel cell offers dramatic improvement over battery power.

52.   The only technology meeting that goal is battery power.

53.   The Spartan solar observatory lost battery power near the end of a two-day free flight.

54.   The Warrior even has an electronic gauge on the headlight to tell you how much energy your legs are contributing and how much power the battery has in reserve.

55.   There is also a power driver that allows the patient to see basic alarm warnings from the internal system, like low battery power.

56.   They mothballed the remaining battery power in the command module and crawled into the lunar excursion module, which became a clammy lifeboat.

57.   They prefer higher-voltage hybrids, and they want automakers to use all the extra battery power to improve gas mileage.

58.   Under complex computer control, the Prius switches from battery power to gasoline power, or a combination of the two, automatically and seamlessly.

59.   Unlike cooling fans, Chiu said, the system runs silently and uses no battery power.

60.   We roughed it on battery power.