How many amps is a 12V car battery?

1 Answers
MacJace
07/30/25 4:36am
Car batteries with 12V typically range from 40 to 100 amps. The working current of a 12V battery depends on its model, i.e., its capacity, which is usually labeled on the casing. The higher the working current, the shorter the duration. For example, a 20Ah battery discharging at 2 amps can last for 10 hours before needing a recharge. Notes: 1. Usage Duration: Over time—after one year, two years, or longer—a car battery will age, its internal resistance will increase, and its voltage will drop. At this point, it is necessary to replace the car battery with a new one. 2. Minimum Starting Voltage: The minimum starting voltage is 11.6V. If the voltage drops below 11.6V, it becomes difficult to start the car. When the battery voltage falls below 10V, the car usually cannot be started.
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