UL

The UL series uses lead plates paired with an absorbent glass mat (AGM) separator, which holds the electrolyte tightly against the plate surface rather than leaving it free flowing. This starved-electrolyte design is what makes valve-regulated construction work: gases produced during charging are recombined within the cell instead of being vented, so the battery never needs topping up. The result is a sealed, maintenance-free battery that holds stable internal pressure and consistent performance throughout its service life, whether on standby float charge or in light cyclic use. Suitable for light cyclic use in alarm, telecom, Security & Fire and small UPS systems.

Every UL battery is manufactured to strict international quality standards, with each stage of production tightly controlled to ensure consistent results across the full range. Robust ABS cases provide lasting protection against impact and everyday wear, while high-purity lead delivers the strength and conductivity needed for dependable performance over the long term. Comprehensive testing is carried out throughout production, from raw materials through to the finished battery, guaranteeing reliability before any unit leaves the factory. Built on decades of engineering expertise, the UL series reflects Ultracell's ongoing commitment to quality, consistency and trust.