How Long To Fully Charge A Dead Car Battery. If your cars battery is dead you probably want to start your car within one hour but to fully charge a 52Ah size of battery form dead required 10 hours. The cars alternator can also power the accessories in your car.
The average car battery is 40 Amp-hours capacity and idling an engine wont properly charge it. A healthy battery shows a reading from 124 to 127 volts. From dead fully discharged it would take a small car battery about 25 hours a larger car or small SUV battery 32 hours or a larger SUV and Truck about 48 hours to fully charge on a 2-amp charge.
It can be low from lights being left on an internal failure extreme hot or cold temperatures a failing.
Charging a normal car battery with a regular car charger of around 8 amperes can take 12 hours or even a whole day to fully charge it. Many of us have relocated town where we rarely need to drive. A lower charging rate will take. If you want this battery fully charged so its dependable youll need to hook it up to a proper.
