How Long To Recharge A Dead Car Battery. The length of time it takes to charge a battery has a lot to do with the type of battery charger you have said Benjamin Jerew an ASE master mechanic since 2001. 3 to 6 hours 20 Amp charger.
On the other hand if the charging is tickling it may take around 24 hours to charge a dead battery completely. One month is a good amount of time. The setting on the charge for charging the battery.
It takes up to 24 hours to fully recharge a completely dead battery.
When you recharge a dead car battery its very helpful to know just how dead it is before you decide how youre going to deal with it. A high-power boost charger for example will charge a lot faster than a simple 1-amp float charger which could take anywhere from four to 12 hours to recharge a battery. The battery in cars with more power might well be dead in two weeks like a BMW. The life span of your battery when left sitting for too long depends on the model of your car and how potent the battery is.
