The APC Replacement Battery Cartridge #18 (RBC18) is a sealed lead-acid (VRLA) battery designed specifically for extending the runtime of select APC UPS models including PS250I, PS450I, SC250RMI1U, and SC450RMI1U. This cartridge provides a nominal 12-volt output with a capacity of 9Ah, delivering reliable and consistent power backup during outages.

Built for easy and safe hot-swappable replacement, the RBC18 comes fully assembled with all necessary connectors, an installation guide, and a battery recycling guide. It supports a typical operational lifespan of 3 to 5 years under standard environmental conditions.

Crafted to meet APC/Schneider Electric standards, this battery ensures optimum compatibility and longevity. It operates safely within an ambient temperature range of 0–40°C, with storage tolerances from -15 to 45°C and humidity up to 95% non-condensing. Compact and robust, the cartridge features dimensions suitable for standalone battery stacks and weighs approximately 2.6 kg.

A limited 2-year warranty protects your purchase, offering repair or replacement support. This replacement cartridge is an efficient solution to prolong the life of your UPS, maintaining uninterrupted power protection for your critical devices.