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An Analysis of the Durability of VRLA Batteries: Technology as the Key Factor

What we call a battery is a device that can store chemical energy by converting electrical energy into active substances that can be regenerated through recharging after discharge; when needed, the chemical energy can be converted back into electrical energy. Nowadays, batteries are widely used in various applications including mobile phones, electric bikes, electric cars, UPS power supplies, photovoltaic energy storage systems, etc. The most commonly used batteries are lead-acid battery VRLA and lithium batteries.

Lead-acid battery VRLA is mainly made from lead and its oxides for the electrodes and sulfuric acid solution for the electrolyte

During discharge, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead. During charging, the main components of both the positive and negative electrodes are lead sulfate. Lead-acid battery VRLA can be divided into vented lead-acid battery VRLA and maintenance-free lead-acid battery VRLA.

Vented lead-acid battery VRLA uses electrodes made from lead and leads oxides and a sulfuric acid solution for the electrolyte. The main advantages are stable voltage and low cost, but the disadvantages are lower specific energy (i.e., the energy stored per unit mass of the battery), short service life, and frequent maintenance required. The most recognizable feature of lead-acid battery VRLA is the plastic top cap with a vent hole that can be unscrewed to fill distilled water and check the electrolyte and gas emissions.

In theory, lead-acid battery VRLA should have their electrolyte density and liquid level checked and replenished with distilled water at every maintenance, but with the advancement of battery manufacturing technology, lead-acid batteries have evolved into maintenance-free lead-acid batteries and gel-maintenance-free lead-acid batteries that do not require the addition of electrolytes or distilled water. The oxygen generated at the positive electrode is absorbed by the negative electrode to achieve oxygen circulation and prevent water loss.

Lead-acid battery VRLA is mainly used in electric bicycles, electric tricycles, UPS power supplies, car starting, etc.

How to use lead-acid battery VRLA?

The most important thing to avoid for lead-acid battery VRLA is deep discharge (discharge to zero) and then recharge, which will greatly reduce the battery life.

  • Charge when the remaining battery capacity is about one-third.

  • Use standard chargers for charging and avoid using fast chargers (for individual users).

  • It is recommended to use a three-stage charging method: constant current, equalization, and float charging.

  • The recommended constant current charging current is between 0.1C and 0.25C, where C is the battery capacity.

  • Set overcharge protection to prevent battery overcharge (excessive charging voltage).

  • When the battery lifespan expires, it should be submitted to a professional for recycling to prevent environmental pollution.

In the process of using batteries, some consumers often give feedback. At EXOR, we not only provide more durable and reliable batteries but also offer car starting solutions that pay attention to every start that drives us forward.

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+60 17-535 9299
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No. 8, Lot 3302, Jalan Permata 2, Arab Malaysian Industrial Park, 71800 Nilai, Negeri Sembilan, Malaysia
+60 17-535 9299