How Long Charge Car Battery. 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. Replacing an old battery is often the first course of action but in many cases recharging your battery will be the best solution.
It takes about 5 minutes to connect the jumper cables to the battery terminals and recharge the battery. Most drivers will need about a couple of days roughly 40 hours to charge a fully depleted electric car battery if they use the standard three-prong. A dead car battery can turn your schedule upside down.
24 to 48 hours 4 Amp charger.
The cars alternator can also power the accessories in your car. So a 2 amp charger will deliver 2. Replacing an old battery is often the first course of action but in many cases recharging your battery will be the best solution. 3 to 6 hours 20 Amp charger.
