Ultracell UL4.5-4 Rechargeable Lead-Acid Battery, 4V 4.5Ah, Sealed VRLA AGM – 20HR Discharge Rate

The Ultracell UL4.5‑4 is a sealed, maintenance-free VRLA (valve-regulated lead-acid) AGM battery that delivers reliable standby power at a capacity of 4.5 Ah (20-hour rate) with a nominal voltage of 4 V. Built for durability, its ABS housing protects internal components and features silver-plated copper Faston (4.8 mm) terminals for superior conductivity. Incorporating oxygen recombination technology and a PbCaSn alloy grid, it minimizes gas emissions and self-discharge, promising a long operational life of up to 5 years. Commonly used in applications like UPS systems, emergency lighting, solar collectors, alarm systems, and backup power supplies thanks to its robust construction and dependable performance.

Key Features:

• 4 V, 4.5 Ah capacity (20 hr rate) ideal for compact backup systems and renewable integration.
• Valve-Regulated Lead-Acid (VRLA) AGM ensures a sealed, maintenance-free design with minimal self-discharge.
• Faston (4.8 mm) silver-plated copper terminals provide durable, low-resistance connections.
• Oxygen recombination & PbCaSn grid alloy reduce gas leakage and extend long-term reliability.
• Tough ABS housing protects battery internals, maintaining integrity in stressful environments.
• Rated 5-year life expectancy, making it a dependable choice for emergency and standby systems.