How to Fix a Battery That Won't Hold a Charge?

[VonAndrew]

Here are the reasons and solutions for a battery that won't hold a charge: 1. The reason why the car battery does not hold a charge may be insufficient electrolyte in the battery, insufficient battery voltage, or sulfation of the battery electrodes. If the electrolyte is insufficient, you can add distilled water or pure water to the battery, but do not use tap water, as this will cause severe self-discharge of the battery. If the electrodes are sulfated, this cannot be repaired, and the battery needs to be replaced. 2. If the battery voltage is insufficient and below 11V, you can use the high-resistance repair function of a repair device to increase the voltage above 11V, so that the battery can be charged. If the battery voltage is below 10V and cannot be increased after charging and repair, the battery must be replaced.