How Long Until Alternator Charges Battery. 1 hour times 100 amps 100AmpHours. It takes roughly an hour to charge your battery fully when driving.
Voltage reading should fall as the car tops off the battery the time it takes depends on battery state of charge about five to ten minutes is normal. I cant get a jump and i dont have a charger. At most you should get around 5 to 10 minutes of driving before your car dies.
Usually the alternator takes about 30 minutes to charge your cars battery but this will depend on your cars system.
Usually the alternator takes about 30 minutes to charge your cars battery but this will depend on your cars system. Any number less than that indicates its not capable to charge the level of battery completely. But it is never that simple. Alternators are used on a boat to charge deep cycle batteries or any marine battery on your boat.
