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The most common reason is that you forgot a light or something similar in the car before leaving it. There could be many reasons why your car battery went flat. Charging your battery over 15 amperes can damage your battery if you are unlucky and make the lifetime shorter. To charge your car battery quickly, without damaging your car battery, I would recommend charging your battery at the rate of 8-15 amperes. Check your car battery charger for any settings for the charging rate and apply the charging rate for your needs. 2-4 ampere is typical for maintenance charging, and it will take around 24 hours to fully charge a dead battery at this load. Usually, a standard car battery charger is giving out 4-15 amperes.
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Long-time charging with low amps is the best for keeping the battery’s lifetime long. Fast charging can damage your battery and will make its life shorter. The speed of your car battery charging should depend on what you want to acquire. What is the best speed to charge a car battery? Here is how long it takes to charge a car battery: For sure, it takes a different amount of time to charge different types and sizes of batteries also, but there are times for a normal-sized car battery around 62 Ah. Charging times with different battery chargersĭifferent car battery chargers give different amounts of power, so the charging time of a car battery will depend a lot on this. An AGM/GEL battery can charge up a bit faster than a regular wet battery. You also have to take in mind the kind of car battery. Usually, a mid-sized car uses a battery of the size 40-80Ah.
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You also have to look at the size of your car battery and the battery type. Low ampere is better for maintenance charging of your battery over long periods. High amperes charge your car battery faster. To fully charge a battery of the size 52 Ah would take about 10 hours from dead to fully loaded, but you could probably start your car within 1 hour.įirst, you have to look at your car battery charger to find out how much ampere it’s giving out. The most common rate for car battery chargers is around 4 amps. The charging time heavily depends on the car battery and the charger’s power output. Generally, it will take 2 to 4 hours to fully charge a car battery with a 20 Amp battery charger and 12 to 24 hours with a 4 Amp charger. Which car battery charger is best to use? How Long Does It Take to Charge a Dead Car Battery