Car Battery Completely Dead How Long To Charge

Continue doing so for a few minutes.

Car battery completely dead how long to charge.

Car charging systems normally hover at around 14 volts and car batteries will often read about 13 volts when fully and recently charged. Start the car which has the good condition battery and the dead battery would start charging. If your car battery is below 12 volts use a dedicated charger. While your vehicle s alternator can keep a healthy battery charged it was never designed to completely recharge a dead car battery.

Now after few minutes have elapsed you should start the car with the flat battery. A car battery is considered discharged when the voltage drops below 12 volts. If it doesn t the battery might need to be replaced. Watch kent s complete car battery clinic series.

Below 12 volts use a dedicated charger your vehicle s alternator can keep a healthy battery charged but it was never designed to completely recharge a dead car battery if the unit in question reads below 12 volts. Charging a dead car battery takes between 4 to 24 hours for a full charge depending on how many amperes your car battery is charging with and the size of your battery. At least 30 minutes of driving will help charge the battery back to a safe level for your next start. The battery in your car can go dead for any number of reasons leaving you stranded.

If it does not work then let the charging continue for few more minutes. It can be low from lights being left on an internal failure extreme hot or cold temperatures a failing alternator long term storage without being used or any number of other reasons.