Will A Dead Car Battery Charge Itself. The alternator will charge the cars battery. If it does not work then let the charging continue for few more minutes.
Also having a dead battery is unavoidable and this fact just proved it. Watch Kents complete Car Battery Clinic Series. As long as the battery cells can still hold a charge an alternator or trickle charger would be able to recharge the battery to a fully charged state after a couple of hours.
2-4 ampere is typical for maintenance charging and it will take around 24 hours to fully charge a dead battery at this load.
A glance at the back parking lot revealed my Buick Reatta glaring at us with dark orange evil eyes. If the charging is done you should remove the jumper. A car battery can do a lot but it cant charge itself. Simply put no car battery whether healthy or dead can charge itself.
