How Long Should You Charge A Dead Car Battery. A car battery usually holds 48 amps so if you take that it charges at approximately 1 amp per hour you can work out how long it will take to charge your battery with various amperage chargers. A healthy battery will show 124 to 127 volts across both terminals when measured with a voltmeter a simple device thats very handy when diagnosing battery issues.
How Long Does It Take to Charge a Dead Car Battery. 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. Yes your Vehicle Battery Charge while it is inactive and this is due to the alternator built into the battery.
Then youll attach the redpositive cable to the battery terminal in the good car and then to the dead one.
The storage capacity of a lead-acid battery is rated in amp-hours Ah. From dead fully discharged it would take a small car battery about 25 hours a larger car or small SUV battery 32 hours or a larger SUV and Truck about 48 hours to fully charge on a 2-amp charge. If your cars battery is dead you probably want to start your car within one hour but to fully charge a 52Ah size of battery form dead required 10 hours. To start the process of re-charging the battery youll first need to get the good car and the bad car as close together as possible.
