How to Solve Low Battery Voltage?

1 Answers
IrisLynn
07/25/25 10:42am
The solution for low car battery voltage is to charge it as soon as possible using a portable charger. For example, the charging method for a 12V 80Ah battery: Use constant voltage with current limiting for charging—charge at 14.8V constant voltage and 20A current limiting for 16 hours, then switch to 4A constant current for 4 hours, totaling 20 hours. When the battery is fully charged, the following phenomena will occur: 1. A large number of bubbles will be generated inside the battery, creating a boiling effect; 2. The terminal voltage rises to its maximum and does not increase further within two hours; 3. The electrolyte level rises to its highest point and does not increase further within two hours; 4. Observe the battery indicator eye—the fully charged state will show a green color.
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