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Charge a car battery with AC    
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John1397



Joined: 16 Aug 2007
Posts: 44

PostPosted: Thu Apr 19, 2012 10:35 am    Post subject: Charge a car battery with AC Reply with quote

I was wondering if you take a non electrolyte capacitor rated .1 mfd at 400 volts pass 125 volts AC through it to a full wave bridge 1 amp rating hook the output to a 12 volt car battery will this act like a trickle battery charger I could build this fairly fast and test the voltage of the battery if it goes up past 15 volts, but thought I would post this idea first?

John
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kuhurdler



Joined: 28 Dec 2006
Posts: 2852
Location: Overland Park, KS

PostPosted: Fri Apr 27, 2012 3:07 pm    Post subject: Reply with quote

you can't charge a car battery that fast. the water would boil inside it. You need to charge it with a low current, 20-50watts at a time.

-Jim
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