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Charging a car's starting battery usually takes 20 hours.

When the car is running, it will use a generator to replenish the battery, but when the battery is severely depleted, it needs to be replenished in a timely manner. The charging capacity of the car alone is not enough, so a portable charger can only be used to charge the battery. Charging the car's starting battery takes 20 hours.

Taking 12V60Ah as an example, the charging method is to use constant voltage current limiting method for charging, with a constant voltage of 14.8V and a current limiting of 15A for charging for 16 hours, followed by a constant current of 3A for charging for 4 hours, for a total of 20 hours.

If the battery is fully charged, it can be judged based on the following phenomena, or if the electric eye is green, it means it is fully charged:

1) A large number of bubbles are generated inside the battery, resulting in boiling phenomenon;

2) The terminal voltage rises to its maximum value and does not rise again within two hours;

3) The electrolyte rises to its highest level and does not rise again within two hours.

Possible causes of car battery failure:

1. After the car engine stops running, high-power appliances such as air conditioning and music players that are forgotten to turn off can cause serious battery depletion. It is absolutely not advisable to use them in this way for a long time.

2. At the end of the battery's lifespan, it will no longer store electricity or self discharge quickly.

Charging a car's starting battery usually takes 20 hours. When the car is running, it will use a generator to replenish the battery, but when the battery is severely depleted, it needs to be replenished in a timely manner. The charging capacity of the car alone is not enough, so a portable charger can only be used to charge the battery. Charging the car's starting battery takes 20 hours.

It depends on the degree of battery depletion and the charging current of the charger.

For example, if the battery is discharged and charged with a current of 1/10 of its own capacity, it can be charged for about 10 hours. That is to say, if a 100AH battery is charged with a current of 10A, it can be charged for about 10 hours.

1、 The function of batteries

1. When the vehicle is not started, the battery serves as a source of power for entertainment, lighting, and glass lifting inside the vehicle. Attention: Do not use electrical equipment for a long time after turning off the engine, otherwise it will cause battery loss and inability to start.

2. When starting, drive the starter motor.

2、 Symptoms before battery failure

1. Difficulty in starting

2. The instrument malfunction light comes on

3. Dimming of headlights

3、 Winter battery inspection

1. The voltage of the car battery is 12V. Except for professional currents that cannot be detected, a commonly used multimeter can detect the voltage. It is recommended to check the voltage and conduct the test overnight on the vehicle to obtain more stable results.

2. Before starting the vehicle, please do not use functions such as seat heating, steering wheel heating, rearview mirror heating, defogging, etc

3. If the battery has been in use for 2 years, it is necessary to conduct more inspections before approaching winter.

4. Frequent ignition within a short period of time. If it fails to start within 5 seconds, wait for 30 seconds before attempting again and turn off all electrical devices.

If there is no ignition for three consecutive times, wait for 3 minutes before attempting again. When igniting, the instantaneous discharge current of the battery is high. If the discharge continues, it will only cause the battery to run out of charge faster and be more difficult to start.

5. Try to contact a friend and pay attention to the positive and negative poles when using the power. When the other party's vehicle is in the starting state, use the power or contact a 4S store or insurance company for assistance.

When the battery is severely depleted, it needs to be replenished in a timely manner. Relying solely on the charging capacity of the car itself is not enough, so a portable charger can only be used to charge the battery. Charging the car's starting battery takes 20 hours. For example, the 12V60Ah charging method adopts a constant voltage and current limiting method for charging, with a constant voltage of 14.8V and current limiting of 15A for 16 hours, followed by a constant current of 3A for 4 hours, for a total of 20 hours. A fully charged battery can be judged based on the following phenomena: 1) A large number of bubbles are generated in the battery, which leads to "boiling" phenomenon; 2) The terminal voltage rises to its maximum value and does not rise again within two hours; 3) The electrolyte rises to its highest level and does not rise again within two hours. Or observe the electric eye, the fully charged state can be determined by the green color of the electric eye.

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