What Causes GEL Lead-acid Batteries to Leak?

GEL lead-acid batteries are designed to be more leak-resistant than traditional flooded lead-acid batteries. However, several factors can still cause them to leak.

  1. Overcharging: Excessive overcharging can cause the electrolyte to heat up and produce gas (oxygen and hydrogen). In a GEL battery, the electrolyte is in a gel form, which helps to recombine the gases, but if overcharging is severe, the pressure buildup can lead to venting or leaking.
  2. Physical Damage: Any physical damage to the battery casing can compromise the seals and cause the gel electrolyte to leak out.
  3. Improper Venting: If the pressure relief valves become faulty or blocked, the internal pressure can build up to a point where the battery casing may crack or rupture, causing a leak.
  4. Manufacturing Defects: Defects in the battery’s construction, such as poor sealing or faulty assembly, can also lead to leaks.
  5. Excessive Heat: Exposure to high temperatures can cause the gel electrolyte to expand, increasing internal pressure and potentially causing leaks.
  6. Old Age: As batteries age, the materials can degrade, leading to cracks or failures in the casing or seals.

To minimize the risk of leaks, it is important to properly maintain GEL lead-acid batteries, avoid overcharging, protect them from physical damage, and operate them within the recommended temperature ranges.


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