How Long Do You Charge A Car Battery. The length of time it takes to charge your car battery is completely dependent on the size or amp of your battery and the amp of the car charger you are using. If the battery is deeply discharged 15-30 minutes on a 40-amp charger will provide charge and give the alternator a chance to finish charging the battery while driving your car.

However always be prepared to leave the charger on overnight in case it takes longer than expected. 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. The length of time it takes to charge your car battery is completely dependent on the size or amp of your battery and the amp of the car charger you are using.
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.
Ad Save 10 with Free Store Pickup. A small car battery can be charged in 24 hours at 2 amps or 5 hours at 10 amps. Ad Save 10 with Free Store Pickup. It depends on what kind of battery youre using and what kind of car battery charger you are going to use.
