How Long Does A Car Battery Take To Fully Charge. How long the charger will take depends on the amperage of the battery charger. In the second test well use a simple voltmeter to check the voltage on the crank.
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. Expect it to take a minimum of eight to 14 hours but if youve got a big car you could. Before asking how long it takes to charge a car battery we have to look at the methods designed to make the charging process as quick and smooth as possible.
The charging time heavily depends on the car battery and the chargers power output.
How Long Does It Take To Trickle Charge A Car Battery. At idle the battery can take around 2 hours to charge up to 80 complete if it was flat and the alternator can generate 14 volts. The graphic below shows the process. How Long do You Need to Charge a Car Battery.
