1.   The batteries are charged on-board by a small gas turbine auxiliary propulsion unit.

2.   The engine charges the batteries, so there is no need to plug it in to charge it up.

3.   Then it needs three hours to charge the battery.

4.   Alex had forgotten to charge the battery.

5.   The ultimate aim is to generate as much electricity as it consumes at all its sites, including shops, across the UK.

6.   And keeping the batteries charged is an aggravation.

7.   And charge your batteries religiously, before you go and at every opportunity.

8.   Are you sure you charged the battery?

9.   As envisioned, the batteries would be charged overnight, when power is less expensive.

10.   As the user walks, the energy from his footsteps would charge the battery of the computer, which would hold vital information about the user.