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Do you charge a car battery on 2 amp or 10 amp?

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Automobile batteries commonly have a capacity of 48 amp hours. This means that it can deliver 1 amp per 48 hours, or 2 amps in 24 hours, 8 amps in 6 hours, and so on. So a 2 amp charger will deliver 2 amp per hour to this "flat" battery, and if it requires 48 amps that in means it needs 24 hours to fully charge.
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