Posted by Zeke Boniface on December 12, 2019 at 10:06:53 from (74.106.194.66):
My dad owned a couple 6 amp Schauer battery chargers in the 60's and 70's. When a battery wasn't badly discharged, those chargers would begin charging at four amps or so. When the battery was seriously discharged, the ammeter would peg for a few seconds, the charger would shut itself off for a bit, then the cycle would repeat. It took some doing to get a really dead battery to charge.
Today I have several vintage chargers of the same type, and none of them will put more than a couple amps into a battery regardless of charge. I have a ten year old Schumacker that isn't much better. (I didn't have a Fluke clamp meter back in the day, but now it isn't hard to confirm the battery's state of charge and the output of the charger.) The charger ammeter will never peg when connected to a battery, but will readily peg when the charger clamps are flashed together.
Any of my old chargers will fully charge a battery sooner or later.
As we speak, one of them is charging a half discharged battery at a blazing 1 amp.
I have a bunch of batteries in a bunch of tractors, trucks, and dozers, and 2 amps is about the most to expect from any charger on any battery.
Interestingly, my 8N with 12 volt alternator and ammeter seems to charge its battery normally; but none of the chargers will. Ideas?
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