Well I don't know, but here's a few thoughts
If it's Summer where you are, and the whole engine was hot right through, then I wouldn't be surprised if putting one's hand on the alternator, it was very hot
But cars with alternators, should recharge a flat but good battery very quickly, although a long slow is needed for a proper full charge. When you have time, recharge your battery overnight (assuming a common home type 2.5 to 6 amps maximum charger)
As 1992 your alternator is probably about 80 amps capacity (I drove old cars with 18 amp dc generators ! )
Perhaps your battery is dying and your alternator's working it's guts out trying to cope. I guess you've already checked battery leads, and the earthing strap (motor to chassis) are good connections.
If not, unscrew and sandpaper/wire wool them clean, then a tiny squirt of CRC/WD 40/ thin smear Vaseline-petroleum jelly whatever, bolt up again etc
Battery voltage when "hot off the charger/ or alternator, should be
13.2 voltsSometimes older cars get slightly dudd connections and wiggling a wiring loom, or unplugging and re-plugging connectors can fix dodgy connections for a long while afterwards
Obviously you don't wanna car to konk out on you, last time you's just down the road in a parking lot, is no real worries, but next time it could be the middle of the night, some dark alleyway, and there you are in a miniskirt and highheels and Mr Serial Killer's out lookin' for ya !
Someone else with extra knowledge please post too, let's try to help this dude out, eh.
HTH
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Catherine Jemma.......(Keeper of The Gem of Amara) Outback Western Australia .... snipped-for-privacy@agn.net.au.knickers
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