How long does it take to fully charge a dead battery?

1 Answers
ODonovan
07/24/25 5:19pm
A dead battery typically takes 10-15 hours to fully charge. There are two methods for charging a battery: fast charging and slow charging. Below are the relevant details about battery charging: 1. Fast charging (constant current charging): Fast charging only quickly activates the surface of the battery, but the battery's interior is not fully charged. 2. Slow charging (constant voltage charging): Another charging method is slow charging, which takes 10-15 hours. Deeply discharged batteries must be charged slowly; otherwise, insufficient charging time or charge will directly affect the vehicle's driving performance.
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