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A faulty alternator is often the cause of a dead battery. In short, your battery always needs a charger of sorts to maintain a charge. It's a job the alternator does if everything's working right.
If you come out one morning and discover a dead car battery, it could be a one-time quirk from leaving the interior or headlights on overnight, especially if the battery revives with a jump-start ...
Boosting a dead battery through a battery charger can take anywhere from five to twenty minutes depending on the depth-of-discharge (DOD), health of the vehicle battery, and type of engine (engine displacement). AC power is not usually available for a roadside boost. Jump starters are portable battery devices that allow for jump starting of ...
Drive the jump-started car for at least 20 minutes so its alternator can recharge the battery Make sure you are somewhere safe and the car is in an easy-to-access location before shutting off the ...
In this case the battery voltage might rise to a value near that of the charger voltage; this causes the charging current to decrease significantly. After a few hours this interface charge will spread to the volume of the electrode and electrolyte; this leads to an interface charge so low that it may be insufficient to start the car. [ 29 ]
Discharging the battery fully before recharging may be called "deep discharge"; partially discharging then recharging may be called "shallow discharge". A "charge cycle" is not a unit of time; the length of time spent charging or discharging does not affect the number of charge cycles. [1] Each battery is affected differently by charge cycles ...