How long does it take to start after jump-starting?

[Raymond]

If the battery is not faulty, as long as the car starts, the battery will automatically charge during driving, and there is no problem of how long it can run. Extended information: 1. Difficulty in starting the car: In the absence of other factors, if the car suddenly has difficulty starting, it may be a sign that the battery is about to fail. If it is winter, there is another possibility, that is, the so-called cold start difficulty. 2. The lights dim when the car is idling: For example, when waiting for a red light or temporarily parking, the headlights suddenly dim. This is because the charging power of the engine decreases when idling. If the battery is almost unusable at this time and it also needs to power other equipment in the car, the headlights consume a lot of power, which will lead to insufficient power supply and cause the lights to dim.