Eventually increasing resistance means that the battery can no longer operate for an adequate period.

Both groups were mandated to operate for an initial period of one year.

Pioneer 9 operated for a particularly long period of time, transmitting data until 1987.

However, the postal service operated for only a very short period, from May to July.

It operates for a brief period, then cuts out and the dream is on its own.

The Fales post office operated for a period during 1881.

The gang are believed to have been operating for a period of more than 20 years.

The park's area was largely vacant - a dinner theater operated for a short period on one of the lower levels, but eventually closed.

The payload will operate continuously for a period of 1.5 years.

"It will be difficult for us to operate this extensively for an extended period of time."