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How Long To Charge Car Battery At 15 Amps. Charging a battery with a car battery charger enough that it can start the car engine will take around 2 to 4 hours. Its necessary to put about 36 amp hours plus 15 more to compensate for the internal resistance in the battery for a total of 36 amps 36 x 015 around 42 amp-hours back into the battery.
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Refers to the 12V 5Ah motorcycle battery when the battery is dead. How long to Charge a Car Battery at 2 amps. For example if you had a 50 amp hour battery and a 5 amp charger it would probably take you about 10 to 12 hours to fully charge that battery from a completely dead state of charge.
13 rows How long to Charge a Car Battery at 15 Amps.
2-4 ampere is typical for maintenance charging and it will take around 24 hours to fully charge a dead battery at this load. Aside from jump starting the fastest but not always the most efficient method you can also consider using a reliable car battery charger. All in all it should take about 7 hours to charge. Long-time charging with low amps is the best for keeping the batterys lifetime long.
