How To Charge A Dead Car Battery With A Charger. A dead car battery can throw a wrench into your plans. A trickle charger is another type of battery charger that allows the vehicles battery to charge for a longer period of time at a lower amp charge rate.
If youre intent on recharging your battery youre. Then when the battery reaches 145 volts the charger will hold it there until one of two things occur. 40 amps has a fast-charging capacity and can charge a cars battery within a few minutes to an hour.
This means that the voltage of the battery is below a functional amount.
With a seriously depleted battery the best thing to do either before or immediately after a jump-start is to connect it to a dedicated battery charger. The charger immediately tries to bring the battery voltage up to about 145 volts. Connect 1 end of the red positive jumper cable to the dead battery then connect the other end to the charged battery. Luckily you can leave the car battery on slow charge even the entire night.
