So I'd say the first thing for us to do is to get our batteries charged.

The batteries are charged each night and can run for about seven or eight hours at a time.

"Then how am I supposed to keep the batteries charged?"

At the start of the race, the batteries may be fully charged.

Her commander decided to stay in position for one more day to charge batteries.

The batteries would be charged for about 5 minutes or so at each end of the route.

No longer did the submarine have to show herself to charge batteries.

A central charging light comes on to let you know that the battery is being charged.

And no battery could still be charged after twenty-one years!

The battery can be fully charged in approximately 2 hours from a 240V power source.