1.   Size is not the only requirement for portability - battery power is important.

2.   The ultimate aim is to replace gasoline altogether by using battery power or other non-polluting energy sources.

3.   To compound the problem, a drop in battery power corrupted the software programme which controlled the radio itself.

4.   You can plug your laptop in or use it on battery power.

5.   If it proves successful, the device will dramatically cut the cost of battery power.

6.   How can you save battery power?

7.   Amped by battery power, this one sends a searing white streak as far as you can see until it strikes a solid object.

8.   And the atmospheric probe has been coasting since July on automatic controls and out of communication to conserve battery power.

9.   Another consideration is battery power.