How Long Does It Take To Charge A Car Battery With Jumper Cables. 24 hours tends to be the best time frame to charge a battery fully. Allowing sufficient time to charge.
And always take caution when the battery is nearly finished charging. At this instance, the charging battery will charge the dead battery for as long as 5 minutes.
At this point, you have to turn on the engine of the car with charged battery(functional car). But you should never charge at such a high rate longer than this.