With the popularity of high frequency switching power supply, VRLA battery is widely used in the electrical system due to its high cost performance, security, and supplying large current. Owing to its sealed, no added water maintenance, the VRLA battery is also called "maintenance-free" lead acid battery. Because the capacity of the battery is not enough or failure, it generates many power supply accidents of substation, computer system, and instrument automation system. Hence, it is very important for us to know the influence factors to help properly use the VRLA battery and prolong its life.

First, the ambient temperature will affect its lifespan. The usage temperature of lead acid battery is typically 25?. In this temperature, the battery can get a longer service lifespan. When the temperature goes up, it will aggravate the corrosion of the battery plates, as well as consume more water, so as to shorten the life. If the long-time running temperature goes up 10%, the lifespan will reduce by half. Plus, the capacity of VRLA battery will vary because of temperature change.

Overcharge and overdischarge will make the plates corrosion and capacity decline, then cause the plates sulfation, finally shorten the life of VRLA battery. The low current discharging will let the lead sulfate crystals generate slowly. If you don't deal with the crystals long time, it must affect the capacity and lifespan of lead acid battery. Besides, the charging and discharging of uneven, as well as the long-time float charge, all will make the life of VRLA battery shorter. The uneven charging and discharging will make the each cell has different voltage, and then have an impact on its usage. Plus, the terminal runaway phenomenon occurring during operating process of VRLA batteries makes the battery shell be out of shape and spalling.

These factors that are given above are some experience collection of my usual using VRLA battery. Maybe there are some other factors that I can't consider affecting the service lifespan of VRLA battery, If you know more, you can tell me.

If you are interested in these VRLA batteries, you can just visit Leoch International, which is an excellent manufacturer of lead acid battery. The company is a public company which has over 10 year's history and it is very reliable and dependable. If you are interested in the company, you can search for more information in the internet. The office website is http://www.leoch.com.