How many amps should I charge a car battery?

Written by keith evans Google
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How many amps should I charge a car battery?
Some car battery chargers offer a number of charging options. (battery charger image by Albert Lozano from Fotolia.com)

According to an article about batteries posted on the environmental website Green Trust, a rating of 12 to 20 amps is preferable for charging deep-cycle batteries like car batteries. In addition, Green Trust recommends charging depleted batteries as soon as possible to avoid long-term damage.

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Chargers Offer Options

Though Green Trust recommends using 12 to 20 amps to charge car batteries, battery chargers typically offer rates that range from two to 30 amps. Larger amperage charges a battery more quickly, according to the British battery website Mr. Power UK, and amperage requirements may vary, depending on the charger's delivery method.

Bottom Line

Though chargers vary considerably in their available amperage and charging methods, a charging rate of 12 to 20 amps is preferable for long battery life.

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