Repairing a valve-regulated lead-acid (VRLA) battery that is not storing electricity can be challenging and may not always be possible, depending on the extent of the damage or degradation. However, here are some steps you can try to revive or troubleshoot the battery.
- Check the state of charge: Use a multimeter to measure the voltage of the battery. If the voltage is significantly below its rated voltage (e.g., below 10.5 volts for a 12-volt battery), it may be deeply discharged. In such cases, attempt to recharge the battery using a compatible charger. If the battery cannot hold a charge or does not show any improvement after charging, proceed with further steps.
- Inspect battery connections: Ensure that the battery terminals and connections are clean, tight, and free from corrosion. Dirty or loose connections can hinder the flow of electricity and affect the battery’s performance. Clean the terminals with a battery terminal cleaner or a mixture of baking soda and water, and tighten any loose connections.
- Perform an equalization charge: Some VRLA batteries benefit from an equalization charge, which involves applying a slightly higher voltage to the battery for a specific period. This process helps balance the individual cells within the battery and can sometimes revive batteries with uneven charge levels. Refer to the battery manufacturer’s guidelines for proper equalization charging procedures.
- Check for sulfation: Sulfation occurs when sulfate crystals accumulate on the battery plates, hindering the chemical reactions necessary for charging and discharging. If the battery has been sitting unused for an extended period, it may have become sulfated. Try using a desulfating charger or a pulse charger designed to break down sulfate crystals and rejuvenate the battery.
- Perform a capacity test: If the battery still does not store electricity effectively after attempting to charge it, consider performing a capacity test to assess its health. A capacity test involves discharging the battery under controlled conditions and measuring the amount of energy it can deliver. A significant decrease in capacity compared to the battery’s rated capacity indicates degradation or damage.
- Consult a professional: If the above steps do not resolve the issue or if you are unsure about performing further troubleshooting, consider seeking assistance from a professional battery technician or contacting the battery manufacturer for guidance. In some cases, the battery may need to be replaced if it cannot be revived or repaired.
Remember that safety precautions should always be followed when handling batteries, including wearing appropriate protective gear and working in a well-ventilated area.
