What is the normal current for a car battery?

1 Answers
MacMelanie
07/29/25 12:09pm
Car battery current is considered normal when it reaches 300-400A. Factors determining current size: The current size depends on the number of electrical appliances in use. For example, just turning on an interior light might consume about 0.3A. Factors affecting battery working current: The working current of a battery depends on its model, i.e., capacity, which is usually labeled on the casing. The higher the working current, the shorter the duration. For instance, a 20Ah battery discharging at 2 amps can last for 10 hours before needing a recharge. The instantaneous maximum current can reach 70 to 100 amps or even higher. However, it's important to note that excessively high currents can lead to problems, including the risk of battery explosion.
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