1Run only on mains power: sound system,personal stereo, colour television, desktop computer,fax
Run only on batteries: mobile phome, video recirder, portable radio, video camera
Can run on either: laptop computer, radio alarm, answer machine, CD player
2 sound system, personal stereo,colour television, mobile phone, portable radio, radio alarm
3 colour television, desktop computer, mobile phone, video recorder, video camera, laptop computer
4sound system ,personal stereo, radio alarm, colour television (??)
5desktop computer, fax,mobile phone,laptop computer, answer machine
