How to Fix a Dead Car Battery?

1 Answers
DelAlexa
07/29/25 3:26pm
There are several reasons why a car battery might die. It could be because the car hasn't been driven for a long time, causing the battery to drain automatically. Another possibility is that the battery has reached the end of its lifespan. Additionally, internal damage to the alternator, reduced electrolyte levels in the battery, or a blown fuse could also be the cause, among other potential reasons. If the battery shows no signs of external damage, swelling, short circuits, or open circuits, the following techniques can be attempted to repair it: Use a positive-negative pulse method to depolarize the battery through charging, then fully discharge it. Repeat this cycle three times. If there are signs of capacity recovery, perform a few more cycles for better repair results. Another method is water replenishment, but only use deionized or distilled water—never tap water, as it can lead to excessive self-discharge of the battery.
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