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post #3 of Old 12-27-2007
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The charging voltage must be greater than the battery voltage to "push" amps into the battery. A typical 12 V battery therefore requires more than 12V to charge it. If the 6 amp charger were operating at 14V, it would take 10 hours to recharge a 120 amp/hr rated battery from 50% charge to a full charge. If you don't fully recharge a battery often, it will quickly kill the battery.
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