VRLA is valve regulated lead acid battery, which requires low maintenance and doesn’t requires any top-up.The VRLA technology ingrained in our batteries provide you with the following benefits:Safety – As the electrolyte is absorbed by the battery, there is no chance of electrolyte leakage in its entire lifespan.Maintenance-free – There’s no need to refill the electrolyte in its entire service life and thus, the battery uses sealed casing where there is no provision for filling the electrolyte.Long-life – VRLA batteries are made using the compression method which ensures less corrosion, thus ensuring a longer lifespan.