Q:

How long does it take to charge a dead battery?

A:

Quick Answer

Charge time for a dead battery can take up to 12 hours or longer. There are many factors that determine how long the charge will take, including the size and age of the battery.

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Full Answer

The two common ways to charge a battery are fast and slow charges. The preferred method is a slow charge as it allows the battery to safely regain all its power.

Slow Charge

It is generally safer to slow charge a battery. Slow charging requires the charger to be set at a consistent 10 amps. Slow charges are recommended for batteries that are to be used long-term.

Fast Charge

A fast charge is when the charger is set to 20 amps. Although the batteries are charged in significantly less time, fast charging can cause them to overcharge.

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