Rechargeable-battery systems

The market for micraelectronic equipment is growing at a seemingly ever-increasing rate. After the era of discrete semiconductors, it is now integrated circuits that make possible the praduction of small and smaller portable electranic equipment. It is estimated that in Britain every family has at least one portable radio and one in every three people has a mobile telephone. Many cars have remote car locks, not to speak of the remote contral units for the video recorder, the audio system, and so on. All these units need batteries, which also have to become smaller and smaller (have a look inside your quartz crystal watch: and that battery is not small by current standards).