The Apple battery IIc was designed to be portable, and since it is powered by 12 to 15 volts DC, it can be run on batteries. A 12-volt sealed lead-acid “gel cell” battery works best, due to the high current draw. I also show the pinout of the IIc’s power supply connector, and demonstrate an unusual BASIC program which generates musical tones on a nearby AM radio, rather than through the computer’s own speaker.
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