The batteries meet the needs of the market for security and signaling systems, low-power uninterruptible power supply (UPS) systems, telecommunications systems, information technology, and emergency power supply sources. The valve-regulated lead-acid (VRLA) battery is a type of rechargeable battery with a safety valve that allows the release of internal pressure in case of overcharging. This type of battery is maintenance-free, as it does not require electrolyte refilling with water throughout its lifespan.